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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior, so the safety profile is covered. The description adds real value beyond that by disclosing what is returned at each stage: status, and the image URL and size only once finished. It does not cover failure/not-found behavior or polling cadence, keeping it short of a 5.

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 front-loaded sentence with no filler; the status list and the conditional return fields are expressed compactly. Every clause earns its place.

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?

With no output schema, the description carries the burden of explaining returns, and it does so well (status plus image URL and size when finished). It is complete for a simple read tool, though it omits what an agent should expect for an unknown logo_id or how to handle a long-running in_progress state.

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 100% and the single parameter logo_id is already described in the schema ('from create_logo or list_logos'). The description adds no syntax, format, or constraint information beyond what the schema provides, so the baseline of 3 applies.

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?

States a specific verb ('Read') and a precisely scoped resource ('one logo'), which cleanly separates it from the sibling list_logos and create_logo. It also enumerates the status values returned, so an agent knows exactly what operation it is invoking.

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?

Usage is only implied: the status enum (queued, in_progress, succeeded, failed) hints that this is a polling tool after create_logo, but the description never says when to call it versus list_logos or what to do if the logo is still in progress. The only routing hint ('from create_logo or list_logos') lives in the schema, not the description.

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