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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered. The description adds real context beyond that: the fixed universe of 133 vendors, and the practical meaning of the channel filter (automatic vs. handled by hand), which tells the agent what dimension of the data it can reason over.

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 clauses in a single front-loaded sentence: the resource and its scope come first, then the filtering options and the motivation. No filler, no repetition of the title or schema.

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 list tool with no output schema, the description covers what is returned (the vendor set), the two filter dimensions, and the intended use. It lacks any note on result size, pagination, or ordering, which is the only remaining gap.

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 both parameters are enum-documented, so the baseline is 3. The description adds interpretive value the schema lacks, framing 'channel' as a build-vs-buy signal ('handled automatically versus by hand') and tying 'category' to concrete concepts like antivirus engines and blocklists.

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 ('List the 133 security vendors this service can send removal requests to') and bounds the scope with a concrete count. The sibling tools (get_removal_guide, get_service_info, scan_domain) cover guides, service metadata, and scanning, so an agent can tell this is the enumeration tool without opening a schema.

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?

Gives clear use context: 'answering which antivirus engines or blocklists a removal effort has to cover, and which of them can be handled automatically versus by hand.' It does not state when NOT to use it or name a sibling alternative, so it stops short of explicit routing.

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