supabase_storage_get_public_url

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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the agent knows this is a safe, read-only operation. The description adds no additional behavioral context (e.g., that it constructs a URL rather than transferring file data, or whether the file must be publicly accessible), but it does not contradict the annotations.

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?

The description is a single, concise sentence that front-loads the action and object. Every word contributes to clarity, with no redundancy or unnecessary elaboration.

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?

The tool is simple, and the annotations cover the safety profile. However, there is no output schema, and the description does not explicitly state that the return value is the URL string or mention any caveats about public access. This is a minor gap, but the overall purpose is sufficiently inferable.

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?

The input schema provides descriptions for both parameters ('Bucket name' and 'File path within the bucket'), resulting in 100% schema coverage. The description adds no extra parameter details beyond what the schema already states, so the baseline of 3 is appropriate.

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 the specific verb 'Get' with the resource 'public URL for a file in a storage bucket.' This precisely distinguishes it from sibling tools like download (which fetches content) and move/delete. The purpose is unambiguous and clearly differentiated.

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 explicit when-to-use guidance or alternatives are provided. The intended usage (when a shareable URL is needed) is implied by the tool name and description, but the text does not mention prerequisites (e.g., bucket must be public) or contrast it with download/other file access methods. This is minimal but not misleading.

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