Write one diagram SVG

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

No annotations are provided, so the description carries full burden of behavioral disclosure. It reveals that it writes a file to images/ or --outDir, which is useful, but doesn't disclose whether it overwrites existing files, what format the file name takes, or failure modes. For a mutation (file-writing) tool with zero annotation coverage, this is thin.

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

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

A single efficient sentence that communicates core purpose and output location. No wasted words, but the CLI-flag phrasing ('or --outDir') is slightly informal for a tool description.

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

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

For a file-writing tool with no annotations and no output schema, the description should explain more: overwrite behavior, file naming, the meaning of the id choices, and relationship to generate_all_fork_diagrams. The enum of 6 valid ids is documented only in the schema, leaving the agent without guidance on what each diagram represents.

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

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

Schema coverage is 50% (outDir is documented in schema, id is not). The description adds the default output directory ('<repo>/images') and the CLI-style '--outDir' flag mention, which adds some value. However, it doesn't explain the id enum values or their semantics beyond existence in the schema.

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

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

The description uses a specific verb+resource ('Generate one Disler-style diagram and write it') against sibling generate_all_fork_diagrams, implying single vs batch output. However, it doesn't explicitly distinguish itself from the sibling generate tool or clarify what 'Disler-style' means concretely.

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

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

No guidance on when to use this tool vs generate_all_fork_diagrams. Sibling named 'generate_all_fork_diagrams' implies this is the single-diagram version, but the description never states this tradeoff or any exclusions.

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