DID.is evidence

by did.is · remote · no sign-in to list tools · v0.1.0 · published by is.did

Read-only checks for DIDs, credentials, MCP servers, A2A cards and agent delegation.

Changes · 3

Compare Registry entry

7 tools: 3 change things and 4 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things3Claude Code: ask: see these tools
Only reads4Claude Code: allow: see these tools

9 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http did https://did.is/mcp

Findings

Matches of fixed checks, with the text they matched.

2 warn7 info

Warnauthorize_tool_call
The server marks "authorize_tool_call" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "authorize_tool_call" says "call": a word for a change.
What this check looks for
Warnevaluate_policy
The server marks "evaluate_policy" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "evaluate_policy" says "evaluate": a word for a change.
What this check looks for
Infoverify_credential
The title mentions "credential".
Matched text
title: "Verify a credential"
What this check looks for
Infoverify_credential
The annotations title mentions "credential".
Matched text
annotations.title: "Verify a credential"
What this check looks for
Infoverify_credential
The description mentions "Credential".
Matched text
description: "Verify a W3C Verifiable Credential or SD-JWT VC (JSON object or compact st..."
What this check looks for
Infoverify_credential
The input schema at properties.credential.description mentions "Credential".
Matched text
inputSchema.properties.credential.description: "Credential as a JSON object (W3C VC with Data Inte..."
What this check looks for

Show 3 more findings

Infoverify_credential
The input schema at required[0] mentions "credential".
Matched text
inputSchema.required[0]: "credential"
What this check looks for
Infoevaluate_policy
The description mentions "credential".
Matched text
description: "...S, linked accounts, verifiable history, credential status). Returns PASS, FAIL or INDETERM..."
What this check looks for
Infoevaluate_policy
The input schema at properties.credential.description mentions "Credential".
Matched text
inputSchema.properties.credential.description: "Credential as a JSON object (W3C VC with Data Inte..."
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

7 tools

Changes things 3Creates or changes something that can be changed back.Claude Code: ask

authorize_tool_callCheck whether a DID.is delegation chain (compact JWTs, root first) allows an agent to call a given tool.1 finding
Why it is in this group
- The name "authorize_tool_call" says "call": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "authorize_tool_call" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "authorize_tool_call" says "call": a word for a change.
  What this check looks for
Description, as the server wrote it
Check whether a DID.is delegation chain (compact JWTs, root first) allows an agent to call a given tool. Returns ALLOW or DENY with the verified chain. Read-only; nothing is stored.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
- title: Check a delegation chain for a tool call
evaluate_policyEvaluate a DID against declarative rules (allowed methods, curves, domain binding, TLS, linked accounts, verifiable history, credential status).3 findings
Why it is in this group
- The name "evaluate_policy" says "evaluate": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Info
  The description mentions "credential".
  Matched text
  description: "...S, linked accounts, verifiable history, credential status). Returns PASS, FAIL or INDETERM..."
  What this check looks for
- Info
  The input schema at properties.credential.description mentions "Credential".
  Matched text
  inputSchema.properties.credential.description: "Credential as a JSON object (W3C VC with Data Inte..."
  What this check looks for
- Warn
  The server marks "evaluate_policy" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "evaluate_policy" says "evaluate": a word for a change.
  What this check looks for
Description, as the server wrote it
Evaluate a DID against declarative rules (allowed methods, curves, domain binding, TLS, linked accounts, verifiable history, credential status). Returns PASS, FAIL or INDETERMINATE (not a pass). Read-only.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
- title: Evaluate a DID against rules
verify_credentialVerify a W3C Verifiable Credential or SD-JWT VC (JSON object or compact string): signature, validity period and status list.5 findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Info
  The title mentions "credential".
  Matched text
  title: "Verify a credential"
  What this check looks for
- Info
  The annotations title mentions "credential".
  Matched text
  annotations.title: "Verify a credential"
  What this check looks for
- Info
  The description mentions "Credential".
  Matched text
  description: "Verify a W3C Verifiable Credential or SD-JWT VC (JSON object or compact st..."
  What this check looks for
- Info
  The input schema at properties.credential.description mentions "Credential".
  Matched text
  inputSchema.properties.credential.description: "Credential as a JSON object (W3C VC with Data Inte..."
  What this check looks for
- Info
  The input schema at required[0] mentions "credential".
  Matched text
  inputSchema.required[0]: "credential"
  What this check looks for
Description, as the server wrote it
Verify a W3C Verifiable Credential or SD-JWT VC (JSON object or compact string): signature, validity period and status list. Optional requiredClaims checks issuer-signed claim values. Read-only.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
- title: Verify a credential

Only reads 4Looks things up and changes nothing.Claude Code: allow

inspect_a2a_agentFetch an A2A agent card (agent URL or card URL) and report its signature status, interfaces and skills.No findings
Why it is in this group
- The name "inspect_a2a_agent" says "inspect": a word for reading.
Description, as the server wrote it
Fetch an A2A agent card (agent URL or card URL) and report its signature status, interfaces and skills. Read-only.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
- title: Inspect an A2A agent card
inspect_mcp_serverInspect a remote MCP server over Streamable HTTP: protocol version, tool inventory fingerprints, declared annotations versus DID.is side-effect heuristics, and changes since the la…No findings
Why it is in this group
- The name "inspect_mcp_server" says "inspect": a word for reading.
Description, as the server wrote it
Inspect a remote MCP server over Streamable HTTP: protocol version, tool inventory fingerprints, declared annotations versus DID.is side-effect heuristics, and changes since the last observation. Read-only; never authenticates to the server.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
- title: Inspect an MCP server
resolve_didResolve a DID (did:key, did:jwk, did:web, did:webvh) and report which evidence dimensions are established and which are not.No findings
Why it is in this group
- The name "resolve_did" says "resolve": a word for reading.
Description, as the server wrote it
Resolve a DID (did:key, did:jwk, did:web, did:webvh) and report which evidence dimensions are established and which are not. Read-only; fetches the DID document from its origin.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
- title: Resolve a DID
search_directorySearch the public DID.is directory of DIDs whose controllers proved control and chose to be listed.No findings
Why it is in this group
- The name "search_directory" says "search": a word for reading.
Description, as the server wrote it
Search the public DID.is directory of DIDs whose controllers proved control and chose to be listed. Matches names and domains. Read-only.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
- title: Search the DID.is directory

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http did https://did.is/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__did__resolve_did",
      "mcp__did__inspect_mcp_server",
      "mcp__did__inspect_a2a_agent",
      "mcp__did__search_directory"
    ],
    "ask": [
      "mcp__did__verify_credential",
      "mcp__did__authorize_tool_call",
      "mcp__did__evaluate_policy"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as did. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/is.did/mcp/changes.xml

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Anlyon alternative

3 of these tools change something. Run those as governed actions.

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Source: MCP Registry. Synced Oct 21, 2026, 18:53 UTC.

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