List top-level symbols in one supported source file.
AI agents call list_symbols to retrieve information from Syntax Map without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs static code analysis to enumerate symbols (functions, classes, variables, etc.) from a source file without executing code, modifying files, or triggering side effects. This is a pure read operation with minimal security risk—the worst outcome is information disclosure of code structure. Confidence is high because the description is clear and unambiguous.
From the tool's definition Tool name is 'list_symbols' and description states it 'List[s] top-level symbols in one supported source file.' This is a retrieval operation with no modification, deletion, or execution of code.
Attacks that exploit this kind of access
List top-level symbols in one supported source file. It is categorised as a Read tool in the Syntax Map MCP Server, which means it retrieves data without modifying state.
Register the Syntax Map MCP server in PolicyLayer and add a rule for list_symbols: 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 Syntax Map. Nothing to install.
list_symbols 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 list_symbols 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 list_symbols. 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.
list_symbols is provided by the Syntax Map MCP server (kht6163/syntax-map-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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