debug_get_call_chain
AI agents call debug_get_call_chain to retrieve information from Polybugger without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves debugging state information (call chain/stack trace) without modifying code execution or system state. Classified as Read because it queries debugger state. Severity is medium rather than low because call chain information could reveal sensitive code paths, business logic, or security-relevant execution flow, though it has no direct side effects.
From the tool's definition Tool name 'debug_get_call_chain' indicates retrieval of debugging information (call stack/chain data). No description provided, but naming and position among sibling debugging tools (debug_get_breakpoints, debug_evaluate) suggests inspection/querying rather…
Attacks that exploit this kind of access
debug_get_call_chain. It is categorised as a Read tool in the Polybugger MCP Server, which means it retrieves data without modifying state.
Register the Polybugger MCP server in PolicyLayer and add a rule for debug_get_call_chain: 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 Polybugger. Nothing to install.
debug_get_call_chain 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 debug_get_call_chain 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 debug_get_call_chain. 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.
debug_get_call_chain is provided by the Polybugger MCP server (wilfoa/polybugger-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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