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ouonet

x64dbg MCP Server

by ouonet

trace_execution

Record an execution trace from the current debugger position, stepping through instructions and capturing address and disassembly at each step. Control tracing depth with max instructions, step into/over calls, and stop at specified breakpoints.

Instructions

Record an execution trace from the current position. Steps through instructions and records address + disassembly at each step. Stops after maxInstructions or a breakpoint.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sessionIdYesSession ID
maxInstructionsNoMaximum instructions to trace (default 500)
traceIntoNotrue = step into calls, false = step over calls
recordRegistersNoRecord full register state at each step (slower)
breakOnCallNoStop tracing when this function/address is called
Behavior3/5

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

With no annotations, the description carries full burden. It states that it records address and disassembly at each step and stops after maxInstructions or a breakpoint. However, it does not mention performance impact, state modifications (read-only?), or interruptibility.

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

Conciseness4/5

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

The description is three sentences, front-loaded with the main action, and no wasted words. It could be more structured but is sufficiently concise.

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?

Given no output schema, the description lacks details on the return format of the trace. It covers purpose and stopping conditions, but could mention output structure or prerequisites like an active session.

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

Parameters3/5

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

Schema coverage is 100% with descriptions for each parameter. The tool description adds context about recording address+disassembly and stopping conditions, but does not significantly expand on what the schema already provides.

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

Purpose5/5

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

The description clearly states it records an execution trace by stepping through instructions, recording address and disassembly. It distinguishes from siblings like step_into or continue_execution by focusing on a trace of multiple steps.

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 does not provide guidance on when to use this tool versus the many sibling debugging tools (e.g., step_into, continue_execution, run_to_address). It lacks explicit context or exclusion criteria.

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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