Find a code symbol (class, method, interface, etc.) by its name or pattern. Use asterisks for wildcards (e.g.
AI agents call knowledge_find_symbol to retrieve information from Knowledge MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and searches for symbols in a codebase without causing side effects. It is a lookup operation analogous to grep or find commands. Even with wildcard patterns, the tool only navigates and queries existing code artifacts without altering them. This places it firmly in the Read category with low severity.
From the tool's definition Tool name 'knowledge_find_symbol' and description 'Find a code symbol (class, method, interface, etc.) by its name or pattern' indicate retrieval/search functionality. No modification, deletion, or execution is mentioned.
Attacks that exploit this kind of access
Find a code symbol (class, method, interface, etc.) by its name or pattern. Use asterisks for wildcards (e.g. It is categorised as a Read tool in the Knowledge MCP MCP Server, which means it retrieves data without modifying state.
Register the Knowledge MCP server in PolicyLayer and add a rule for knowledge_find_symbol: 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 Knowledge MCP. Nothing to install.
knowledge_find_symbol 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 knowledge_find_symbol 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 knowledge_find_symbol. 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.
knowledge_find_symbol is provided by the Knowledge MCP server (paulthesecond/knowledgebase-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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