set_pdf_metadata

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

With no annotations, the description must cover behavioral traits. It mentions preservation behavior and output file defaults, but lacks details on file handling (e.g., overwrite risks, error conditions, permissions). Does not fully disclose potential destructive actions.

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?

Structured as a docstring with Args and Returns sections. Each line is purposeful and front-loaded with action. Could be slightly more concise but remains readable and efficient.

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 tool with 9 parameters and no annotations, the description covers key aspects like output file handling and preservation. However, it lacks information on error handling, file validation, and return value specifics beyond stating 'JSON string with operation results'.

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 description coverage is 0%, so the description adds value by explaining each parameter (e.g., 'Path to source PDF file', 'Keywords or tags (comma-separated)'). This compensates for the schema's lack of descriptions, though some descriptions are minimal.

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 explicitly states 'Write or update PDF metadata fields,' providing a clear verb and resource. This action is distinct from siblings like 'get_pdf_metadata' and 'remove_pdf_metadata', making purpose unambiguous.

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 versus alternatives. There is no mention of prerequisites, scenarios, or when to avoid using it. Siblings like 'get_pdf_metadata' and 'remove_pdf_metadata' exist but no comparative advice.

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