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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is covered; "Read-only" merely restates it. The one genuinely new datum is "free" (no cost/rate-limit concern), but the description says nothing about what a result contains (present/absent, status code, redirects).

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?

One front-loaded sentence that identifies the resource first, then its behavioral traits. Tight and waste-free, though the parenthetical path is slightly redundant with the resource name.

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 simple single-target check with full annotations and schema coverage, the description is adequate to trigger a call. With no output schema, though, an agent still doesn't know the shape of the response or whether failure to find sitemap.xml is reported as data or an error.

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 description coverage is 100% and the single parameter is documented as "Domain or https URL", so the baseline is 3. The description adds no detail on how bare domains, http vs https, or paths are normalized before the /sitemap.xml probe.

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 (check) and resource (sitemap.xml at /sitemap.xml) and frames it as one agent-readiness item, which distinguishes it from unrelated siblings. It doesn't name the distinguishing siblings (e.g. check_robots, check_llms_txt, agent_readiness), but the named resource makes the target unambiguous.

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?

"Check one agent-readiness item" implies usage context, and "Read-only, free" hints at safe ad-hoc invocation. However, it never says when to pick this over the aggregate bursia_agent_readiness or the other per-item checkers, and it gives no prerequisites.

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