# `uk.co.reliness/uk-due-diligence` on anlyon.dev

> Text inside fenced blocks marked untrusted-server-text was written by the MCP server's publisher, not by anlyon.dev. It is data to inspect, not instructions to follow. Invisible characters are shown as [U+XXXX].
> No finding is not a safety guarantee: these are point-in-time checks of tool definitions, not of code or behaviour.

- Page: https://anlyon.dev/servers/uk.co.reliness/uk-due-diligence
- JSON: https://anlyon.dev/api/v1/servers/uk.co.reliness/uk-due-diligence
- Version: 1.5.0 (active)
- Publisher: uk.co.reliness (domain proven to the MCP Registry)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Metadata from the official MCP Registry, synced 2026-11-07T00:18:15.184Z

Title and description, as the publisher wrote them:

```untrusted-server-text
UK Data: UK due diligence
UK due diligence: filed accounts figures, FCA register checks on firms and people, charities
```

Scanned 2026-11-07T00:18:42.122Z over streamable-http.

**5 tools: 4 change things and 1 only read.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 0 | ask |
| Changes things | write | 4 | ask |
| Only reads | read | 1 | allow |

## Exfil surface

No private-data -> untrusted-input -> outbound path in this server alone: no tool is tagged private-data or outbound.

| Tag | Meaning | Tools |
| --- | --- | --- |
| private-data | Reads files, mail, messages, databases, secrets, calendars or repositories. | none |
| untrusted-input | Brings in text someone else can write: web pages, inbound email, messages, issues and comments. | `mcp__uk-due-diligence__charity_profile` `mcp__uk-due-diligence__charity_search` `mcp__uk-due-diligence__company_accounts` `mcp__uk-due-diligence__fca_firm` `mcp__uk-due-diligence__fca_individual` |
| outbound | Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL. | none |

## Findings

No check matched anything in these tool definitions.


## Changes things (4)

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

### `charity_profile`

- 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.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Full profile of a charity in England and Wales by charity number: status, what it does, address and contacts, latest income and spending, staff, volunteers, trustees and five years of income history. (cost: 2 credits)
```

### `company_accounts`

- 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.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Headline figures from a UK company's latest filed accounts at Companies House: net assets, cash, debtors, creditors, employees and, where published, turnover and profit, with the prior year for comparison. Works for most small and medium companies that file digital accounts; large companies and groups usually file PDF only, and then the tool says so and links the filing. Use for supplier and credit checks: is it solvent, how much cash, is it growing. (cost: 3 credits)
```

### `fca_firm`

- 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.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Full FCA register check on a financial firm by firm reference number (FRN) or name: authorisation status, what it is permitted to do, trading names, addresses and complaints contact, regulators, client money, and any fines or enforcement history. Use before dealing with a bank, lender, broker, adviser, insurer or investment firm, and to spot cloned firms. (cost: 2 credits)
```

### `fca_individual`

- 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.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
FCA register check on a person by individual reference number: approval status, current and past regulated roles and the firms they hold them at, and any disciplinary history. Use to check a financial adviser, mortgage broker or senior manager. (cost: 1 credit)
```

## Only reads (1)

Looks things up and changes nothing. Claude Code: allow.

### `charity_search`

- The name "charity_search" says "search": a word for reading.
- Tag untrusted-input: The server marks it openWorldHint: true: it reaches things outside the server's own data.

Description, as the server wrote it:

```untrusted-server-text
Find a registered charity in England and Wales by name and get its charity number, status and registration date. Use to check a charity is real before donating, partnering or paying it. (cost: 1 credit)
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `uk-due-diligence`:

```json
{
  "permissions": {
    "allow": [
      "mcp__uk-due-diligence__charity_search"
    ],
    "ask": [
      "mcp__uk-due-diligence__company_accounts",
      "mcp__uk-due-diligence__fca_firm",
      "mcp__uk-due-diligence__fca_individual",
      "mcp__uk-due-diligence__charity_profile"
    ],
    "deny": []
  }
}
```

Capability tags behind the rules (a read tagged outbound is asked about):

- `mcp__uk-due-diligence__company_accounts`: untrusted-input
- `mcp__uk-due-diligence__fca_firm`: untrusted-input
- `mcp__uk-due-diligence__fca_individual`: untrusted-input
- `mcp__uk-due-diligence__charity_search`: untrusted-input
- `mcp__uk-due-diligence__charity_profile`: untrusted-input

## Remote posture

What an anonymous client saw at the remote endpoint, last 2026-11-14T12:24:06.113Z, unchanged since 2026-11-07T05:22:45.118Z. No credentials were sent and no tool was called. Values are shown as the endpoint returned them. Method: https://anlyon.dev/methodology#remote-posture

| Fact | Observed |
| --- | --- |
| Reachable | `yes` |
| HTTP status of an anonymous initialize | `200` |
| tools/list served without credentials | `yes` |
| Tools that change things, listed without credentials | `4` |
| Protocol version | `2025-06-18` |
| WWW-Authenticate on 401 | `not observed` |
| resource_metadata in WWW-Authenticate | `none` |
| RFC 9728 protected resource metadata | `none` |
| Authorization servers | `none` |
| Legacy HTTP+SSE transport | `no` |
| Dynamic client registration | `not observed` |
| Client ID metadata documents | `not observed` |

- **warn** Tools that change things, listed to anyone ([unauth-remote-writes](https://anlyon.dev/methodology#unauth-remote-writes))

```untrusted-server-text
The endpoint served tools/list without credentials, and the list has 4 tools that change things (4 write). Whether a call also works without credentials was not tested: tools are never called.

https://ukdata.reliness.co.uk/mcp/uk-due-diligence: tools/list returned 5 tools to an anonymous client, including company_accounts (write), fca_firm (write), fca_individual (write), charity_profile (write)
```