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

With readOnlyHint/destructiveHint/openWorldHint already declaring the safety profile, the description still adds real context: authentication prerequisite, no company required, idempotency, and no false company facts. The confirmation-boundary sentence, however, is generic policy boilerplate listing saves, fact records, link prep and plan refreshes that this tool never performs, which muddies rather than clarifies.

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 purpose and usage constraint are front-loaded in the first sentence, which is good. The trailing confirmation-boundary clause is a long run-on enumerating irrelevant scenarios and is the one part that does not earn 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 zero-required-parameter read tool with annotations and no output schema, the description covers purpose, trigger, exclusion, auth prerequisite and idempotency. The only gap is the undocumented `_corply_context` object, which is minor given it is optional.

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?

There is one parameter (`_corply_context`) at 0% schema description coverage, so the schema explains nothing. The description partially compensates by noting the authenticated-connection prerequisite and that no company is required, but it never explains the context object's `id`/`receipt` fields, leaving the agent to infer them.

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 names a specific verb and resource — 'Show Corply's one-time welcome' with the concrete visual (the bird waving). No sibling tool overlaps this surface, and the agent can identify it immediately as the welcome-card renderer.

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?

It states the triggering condition ('Use only when the founder asks to see the welcome card') and an explicit exclusion ('it is never a setup or formation prerequisite'), which is exactly the disambiguation an agent needs given the many formation/setup siblings.

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