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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered by structured data. The description adds value beyond that by disclosing the exact response shape ({active: boolean}), which matters because no output schema exists. It stops short of noting any caching or rate-limit behavior, so it is good but not exhaustive.

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 short sentences, zero filler, with the purpose stated first and the return shape second. Nothing is repeated from the title or annotations.

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 parameterless read tool with no output schema, the description supplies the two things an agent needs: what is being checked and the exact return payload. The scope is stated as account-level, which pre-empts confusion with the per-group watermark siblings.

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 nothing for the description to disambiguate and the baseline of 4 applies. The stated scope ('on the account') does usefully confirm the implicit target of the read, which is slightly better than pure baseline.

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 pairs a specific verb (check) with a specific resource (watermark/DRM active status on the account), so an agent immediately knows this is a state read rather than a mutation. It does not explicitly name the closely related siblings (panda_enable_watermark, panda_disable_watermark, panda_get_watermark_group), but the read-only status purpose is unambiguous on its own.

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?

There is no explicit when-to-use guidance and no alternatives named; the agent must infer that this is the read that precedes panda_enable_watermark / panda_disable_watermark or that complements panda_get_watermark_group. The scope ('on the account') is stated, which narrows usage somewhat, but nothing tells the agent when this tool is the wrong choice.

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