dbg_watch
Manage a persistent set of watch expressions and evaluate them in the current stopped frame.
This record as markdown: /tools/godot-breakpoint-mcp/dbg-watch.md
What dbg_watch does on Godot Breakpoint
AI agents call dbg_watch to retrieve information from Godot Breakpoint without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why dbg_watch is rated Low
This tool evaluates watch expressions during debugging—a read-only introspection operation. It retrieves and displays values from the stopped execution frame but does not create, modify, delete, or execute code. The phrase 'evaluate them' refers to computing the values of expressions in their current context, not executing arbitrary logic.
From the tool's definition Tool name 'dbg_watch' and description 'Manage a persistent set of watch expressions and evaluate them in the current stopped frame' indicate querying/inspection of debugger state without modifying game code or data.
Attacks that exploit this kind of access
The rule that runs dbg_watch safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Godot Breakpoint, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For dbg_watch, this is the rule to start with:
dbg_watch is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Godot Breakpoint, apply this rule, and every dbg_watch call is checked against it from then on.
Questions about dbg_watch
Manage a persistent set of watch expressions and evaluate them in the current stopped frame. It is categorised as a Read tool in the Godot Breakpoint MCP Server, which means it retrieves data without modifying state.
Register the Godot Breakpoint MCP server in PolicyLayer and add a rule for dbg_watch: 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 Godot Breakpoint. Nothing to install.
dbg_watch 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 dbg_watch 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 dbg_watch. 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.
dbg_watch is provided by the Godot Breakpoint MCP server (jlivingston-Cipher/godot-breakpoint-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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