Sets a breakpoint at a specific file and line. Breakpoints persist until the session ends. WHEN TO USE: - BEFORE calling start_debug_session to set initial breakpoints - DURING a paused session to add additional breakpoints PATH FORMAT - Use LOCAL paths relative to your project root: - Correct:
AI agents use set_breakpoint to create or update resources in Smart Xdebug — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Smart Xdebug environment.
This tool creates/writes a breakpoint configuration in the debug session. It is reversible (breakpoints can be removed or expire at session end) and does not execute code, delete data, or involve financial operations.
From the tool's definition Sets a breakpoint at a specific file and line. Breakpoints persist until the session ends.
Risk signalsAdmin/system-level operation
Attacks that exploit this kind of access
Sets a breakpoint at a specific file and line. Breakpoints persist until the session ends. WHEN TO USE: - BEFORE calling start_debug_session to set initial breakpoints - DURING a paused session to add additional breakpoints PATH FORMAT - Use LOCAL paths relative to your project root: - Correct:. It is categorised as a Write tool in the Smart Xdebug MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Smart Xdebug MCP server in PolicyLayer and add a rule for set_breakpoint: 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 Smart Xdebug. Nothing to install.
set_breakpoint is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the set_breakpoint 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 set_breakpoint. 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.
set_breakpoint is provided by the Smart Xdebug MCP server (wallter/smart-xdebug-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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