find_similar

THE RISK

Low Risk

Why find_similar needs a policy

The tool performs code discovery and search functionality without creating, modifying, deleting, or executing any code. It purely retrieves and queries existing data to find related implementations. This is a Read category tool with low severity since misuse would only expose existing code information without side effects.

From the tool's definition Tool name is 'find_similar' and description states it 'Find[s] code similar to a given symbol' for 'discovering related implementations, similar patterns, or alternative approaches.' This is a search/retrieval operation with no modification or execution of…

Documented attack patterns abuse exactly the kind of access find_similar gives an agent:

POLICY

How to control find_similar

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Context Manager, and nothing reaches the server without passing your rules. This is the rule we recommend for find_similar:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "find_similar": {}
  }
}

find_similar is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register MCP Context Manager — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More MCP Context Manager tools

Destructive clear_cache Clear the cached index for a repository. Useful if cache becomes corrupted or you want to Destructive delete_symbol 🗑️ NEW: Delete a symbol (Serena-inspired). Remove function/class/etc cleanly. Symbol-leve Execute build_dependency_graph 🚀 NEW: Build dependency graph for the entire codebase. Call this once after indexing to e Execute index_repository 🔧 REQUIRED FIRST STEP: Index or re-index the repository to enable all context-manager too Write insert_after_symbol ✏️ NEW: Insert code after a symbol (Serena-inspired). Symbol-level editing without reading Write replace_symbol ✏️ NEW: Replace a symbol with new code (Serena-inspired). Surgical precision editing. Repl Read find_symbol ⭐ PREFERRED FOR SYMBOLS: Use this INSTEAD OF Grep when looking for specific functions, cla Read find_symbol_references 🔍 NEW: Find all places where a symbol is used (Serena-inspired). Shows usages across all

All 21 MCP Context Manager tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about find_similar

What does the find_similar tool do? +

Find code similar to a given symbol. Useful for discovering related implementations, similar patterns, or alternative approaches. It is categorised as a Read tool in the MCP Context Manager MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on find_similar? +

Register the MCP Context Manager 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 MCP Context Manager. Nothing to install.

What risk level is find_similar? +

find_similar is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit find_similar? +

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.

How do I block find_similar completely? +

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.

What MCP server provides find_similar? +

find_similar is provided by the MCP Context Manager MCP server (transparentlyok/mcp-context-manager). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Context Manager tool call.

Start from MCP Context Manager, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →