create_metadata

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

No annotations provided, so description must disclose behavioral traits. It mentions persistence and accessibility, but lacks details on permissions, reversibility, side effects, or error behavior for unsupported file types. For a mutation tool, this is insufficient.

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?

Three sentences, front-loaded with the main purpose. No fluff. Efficient and to the point.

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?

No output schema; description explains file-type behavior but omits important context: what happens to original file (overwritten?), handling of other image formats, and output file specifics. Adequate but not thorough for a multi-format injection tool.

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 100%, so baseline is 3. The description adds value by explaining the injection format (tEXt/EXIF), providing context beyond the parameter descriptions. However, it doesn't clarify JPEG field naming conventions.

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 clearly states the verb 'Inject data into a file's metadata fields' and specifies the resource. It distinguishes behavior for PNG (tEXt chunk) and JPEG (EXIF APP1), which differentiates it from sibling tools like create_comment or jpeg_comment.

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?

The description implies when to use (when metadata injection is needed) but provides no explicit guidance on when not to use it or how it compares to siblings like archive_metadata or doc_pdf_metadata. No exclusions or alternatives mentioned.

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