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

With no annotations, the description carries the full burden and does disclose the key behavioral trait: it is asynchronous and returns a job_id immediately rather than assets. However, it omits cost/credit implications, failure modes, and the significance of the mandatory owns_rights confirmation.

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?

Two tight sentences, zero filler, with the deliverable stated first and the async return/polling contract immediately after. 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?

For a tool with no output schema and no annotations, the description covers the two things an agent most needs: what is produced and that the result arrives via get_job. Minor gaps remain around cost and the hard owns_rights=true gate, but nothing blocking is missing.

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 67% — prompt and owns_rights are documented in the schema, project_name is not. The description adds no parameter meaning at all (not even that prompt drives the four variants), so it neither compensates for the gap nor adds value beyond the schema.

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 and resource plus the concrete deliverable: four named logo types (wordmark, emblem, lettermark, mascot). This clearly distinguishes it from generate_banner, generate_music_bed, or generate_teaser_video, though it doesn't explicitly say how it differs from the closer sibling generate_image.

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?

Provides a follow-up workflow instruction ('poll get_job for assets'), which is genuinely useful, but gives no guidance on when to pick this over generate_image or generate_launch_kit, and no prerequisites or exclusions are stated.

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