list_symbols
AI agents call list_symbols to retrieve information from Ast Editor without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool lists/enumerates symbols (likely functions, classes, variables) in code using AST analysis. This is a Read operation—it retrieves information about code structure with no side effects. The empty description prevents higher confidence, but the name strongly suggests querying rather than modification. Low severity because listing symbols poses minimal risk even if misused by an agent.
From the tool's definition Tool name 'list_symbols' indicates retrieval/enumeration of code symbols without modification. This aligns with sibling tools that are structural editors (add_*, delete_*, append_to_*), making list_symbols a query/discovery counterpart.
Attacks that exploit this kind of access
list_symbols. It is categorised as a Read tool in the Ast Editor MCP Server, which means it retrieves data without modifying state.
Register the Ast Editor 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 Ast Editor. 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 Ast Editor MCP server (kambleakash0/ast-editor). 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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