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nzrsky

xctools-mcp-server

xctrace_symbolicate

Convert .trace files into human-readable symbolicated traces by resolving debug symbols from dSYM files, making performance analysis actionable.

Instructions

Symbolicate a trace file using debug symbols.

Args: input_file: Path to the .trace file to symbolicate output_path: Path to save the symbolicated trace dsym_path: Path to dSYM file or directory containing dSYMs

Returns: Symbolication result

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
input_fileYes
output_pathNo
dsym_pathNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are provided, so the description carries the full burden. It discloses the use of debug symbols but fails to mention side effects (e.g., file creation), required permissions, or what happens if dSYM is missing. Limited behavioral context beyond the obvious.

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

Conciseness5/5

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

Extremely concise, one sentence for the main purpose plus a clear list of parameters. No unnecessary words, all information is front-loaded.

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?

With an output schema present, the return value need not be explained. However, the description lacks usage guidelines and behavioral details. It is minimally adequate for a simple tool but leaves gaps in context.

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 description coverage is 0%, but the description adds basic meaning to all three parameters (input_file, output_path, dsym_path). However, it could be more detailed (e.g., file format, how output_path defaults). It improves upon the schema but not substantially.

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 uses a specific verb 'Symbolicate' and resource 'trace file', clearly distinguishing it from sibling tools like xctrace_export or xctrace_record.

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?

No guidance on when to use this tool versus alternatives, no prerequisites or context provided. The description simply states what it does without any usage restrictions or recommendations.

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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