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

Annotations already declare readOnly/idempotent/openWorld, and the description adds real context beyond them: the Streamable HTTP endpoint, that initialize and tools/list need no key while tools/call needs a Bearer token, the 50-credit trial and USDC-on-Base top-ups, and an optional secondary stills endpoint. It stops short of describing response shape or rate behavior, keeping it just under 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?

Front-loads identity, then connection/auth/cost, then use/avoid conditions, then scope limits — a sensible order with little wasted text. A few trailing items (site URL, "No earnings promises", the optional stills endpoint) are close to boilerplate but still additive.

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 zero-param, no-output-schema pointer tool, this is nearly everything an agent needs: endpoint, protocol, key behavior, cost model, and boundaries versus siblings. The only gap is what a tools/call response actually contains, though that arguably belongs to the remote service.

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 tool takes zero parameters, so there is no per-argument meaning to add; baseline 4 applies. The description instead documents transport and auth requirements, which is the relevant information for invocation.

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 resource and role: a pointer to CrewPay's Creative service, a remote MCP that generates logos, memes, banners, sticker packs, music, and teaser videos. It also delimits itself from siblings by naming what it is not (escrow jobs, coin launches, proxying generate calls).

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?

Contains an explicit "When to use" (need launch art) and "When not to use" (human escrow jobs via post_coin_job, coin launches), plus a scope disclaimer that it does not proxy generate calls or spend credits. An agent can route correctly without opening other schemas.

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