Display symbol information (resolve wildcards)
AI agents call display_symbol to retrieve information from MCP Debug Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool reads and displays symbol information from a debugging session. It resolves symbol names (potentially with wildcards) and returns information without modifying state, executing code, or causing side effects. This is a read/query operation within a debugger context.
From the tool's definition Display symbol information (resolve wildcards)
Attacks that exploit this kind of access
Display symbol information (resolve wildcards). It is categorised as a Read tool in the MCP Debug Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Debug Server MCP server in PolicyLayer and add a rule for display_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 MCP Debug Server. Nothing to install.
display_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 display_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 display_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.
display_symbol is provided by the MCP Debug Server MCP server (nickzer0/mcp-debugserver). 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.
Teams ship this data inside their own products. See what a licence covers →