get_upload_url

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

No annotations provided, so description carries full burden. It indicates the URL is for upload but does not disclose whether the URL is temporary, requires authentication, or specific HTTP method (PUT). The description adds some behavioral context but misses important constraints.

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?

Single sentence with no wasted words. Front-loaded with core action and context. Highly concise.

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, so description should explain return format (URL, expiration). It does not. Additionally, the tool is part of a workflow (upload then create post), but no guidance on sequence. Incomplete for a tool with 4 required parameters.

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 does not add extra meaning beyond repeating the purpose and media type. No explanation of parameter interactions or format beyond what schema provides.

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 action (get a presigned S3 URL) and the resource/context (upload media for a post). It specifies media types (image/video) and differentiates from siblings, which handle posts, comments, and user management, not uploads.

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 usage when needing to upload media for a post, but lacks explicit when-not-to-use or alternative tools. Since no other upload tool exists among siblings, it is sufficient but not maximally helpful.

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