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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds genuinely useful behavioral context beyond that: the tool returns comparison/alternatives pages rather than a summary, plus 'honest limits', which signals the response includes anti-marketing self-critique an agent should not discard.

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?

A single sentence that front-loads the input shape, then lists exactly what comes back. No filler, no restatement of the name or title.

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 read-only, single-parameter tool with no output schema, the description adequately describes the return content. The only gap is ambiguity handling — whether an unknown or non-listed competitor is still accepted or returns nothing.

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?

With one parameter at 100% schema coverage, the baseline is 3, and the description earns slightly more by enumerating concrete accepted values ('Kululu', 'Walls.io', 'Slido', 'Glip'), showing the vocabulary expected beyond the schema's bare 'Product name.'

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 action and resource: given a competitor, return QR Wall's comparison and alternatives pages, the one-paragraph answer, and QR Wall's stated limits. The examples ('Kululu', 'Walls.io', 'Slido', 'Glip') plus the sibling set (find_use_case, get_facts, get_pricing, list_demos) make it obvious this is the only competitive-comparison tool.

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?

Usage is only implied: an agent can infer this is for competitor/alternative questions, but there is no explicit when-to-use, when-not-to-use, or routing to a sibling (e.g. get_pricing for cost questions). The input examples help scope the trigger but do not define it.

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