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0xhackerfren

Frida Game Hacking MCP

by 0xhackerfren

resume

Resume a paused process to continue execution. Use this tool to restart suspended game processes for debugging or modification purposes.

Instructions

Resume a spawned process.

Returns:
    Resume status.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Implementation Reference

  • The handler function for the 'resume' tool. Resumes a spawned process by calling Frida's device.resume(pid). Checks if session is attached and spawned.
    @mcp.tool()
    def resume() -> Dict[str, Any]:
        """
        Resume a spawned process.
        
        Returns:
            Resume status.
        """
        global _session
        
        if not _session.is_attached():
            return {"error": "No active session. Use spawn() first."}
        
        if not _session.spawned:
            return {"error": "Process was not spawned."}
        
        try:
            device = get_device()
            device.resume(_session.pid)
            return {"success": True, "message": f"Resumed {_session.process_name}"}
        
        except Exception as e:
            return {"error": f"Failed to resume: {str(e)}"}
  • The 'resume' tool is listed under process_management category in the list_capabilities tool response, indicating its registration in the toolset.
    "process_management": [
        "list_processes", "attach", "detach", "spawn", "resume", "get_session_info"
    ],
  • Helper function get_device() used by resume() to obtain the Frida device instance needed for resuming the process.
    def get_device() -> Any:
        """Get the local Frida device."""
        global _session
        if _session.device is None:
            _session.device = frida.get_local_device()
        return _session.device
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries full burden but offers minimal behavioral insight. It mentions a return value ('Resume status') but does not clarify what 'resume' entails (e.g., does it restart execution, affect memory, require specific permissions?). This is inadequate for a mutation tool with zero annotation coverage.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is brief and front-loaded with the main action, but the second sentence ('Returns: Resume status.') is redundant given the presence of an output schema. This slightly reduces efficiency, though the overall structure is acceptable.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with 0 parameters, an output schema, and no annotations, the description is minimally complete. It states the action and hints at a return, but as a mutation tool, it should better explain behavioral implications (e.g., side effects, prerequisites) to be fully helpful.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 0 parameters with 100% coverage, so no parameter documentation is needed. The description appropriately does not discuss parameters, earning a high baseline score for not adding unnecessary information.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb ('Resume') and resource ('a spawned process'), making the purpose unambiguous. However, it does not distinguish this tool from potential sibling actions like 'attach' or 'detach' that might also interact with processes, which prevents a perfect score.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. Given sibling tools like 'spawn' (to start a process) and 'detach' (to disconnect), it lacks context on prerequisites (e.g., must have a paused process) or exclusions, leaving usage unclear.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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