find_similar
Given one charity's slug, return up to limit other charities in the same country + category. Useful for 'find more like this' recommendations. Excludes the input charity from the result.
This record as markdown: /tools/com-giveradar-charity-registry/find-similar.md
What find_similar does on Charity Registry
AI agents call find_similar to retrieve information from Charity Registry without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
slug | string | Yes | Source charity slug. |
limit | integer | — |
Parameters from the server's own tool schema.
Why find_similar is rated Low
This tool retrieves existing charity registry data without side effects. It searches and filters records based on country and category matching, analogous to a filtered search or recommendation query. There is no write, execute, destructive, or financial impact—only data retrieval from a read-only registry search operation.
From the tool's definition Tool performs a query operation ('return up to `limit` other charities') that retrieves and recommends similar charity records based on search criteria. No data is created, modified, or deleted.
Attacks that exploit this kind of access
The rule that runs find_similar safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Charity Registry, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For find_similar, this is the rule to start with:
find_similar is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Charity Registry, apply this rule, and every find_similar call is checked against it from then on.
Questions about find_similar
Given one charity's slug, return up to limit other charities in the same country + category. Useful for 'find more like this' recommendations. Excludes the input charity from the result. It is categorised as a Read tool in the Charity Registry MCP Server, which means it retrieves data without modifying state.
find_similar accepts 2 parameters: slug, limit. Required: slug. The full parameter table on this page comes from the server's own tool schema.
Register the Charity Registry MCP server in PolicyLayer and add a rule for find_similar: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Charity Registry. Nothing to install.
find_similar is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the find_similar rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for find_similar. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
find_similar is provided by the Charity Registry MCP server (https://giveradar.com/mcp/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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