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

Annotations already declare readOnlyHint=true and openWorldHint=true, and "Read-only, free" merely restates that. The genuinely additive part is disclosing which endpoints are fetched (/.well-known/skills/index.json or /.well-known/agent-skills/index.json), which tells the agent what network probing occurs, but nothing is said about failure modes or result shape.

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 front-loaded sentence that leads with the action and the resource before the path detail. The trailing "Read-only, free" is minor filler that duplicates the annotations, keeping it just short of a 5.

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?

With no output schema, the description should indicate what a check returns (found/not found, parsed content, errors), and it does not. The safety profile and target are adequately covered, but the result contract for a one-parameter probe tool is left unstated.

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?

Only one parameter with 100% schema coverage, so the schema already documents "Domain or https URL." The description adds the qualifier "public website," hinting that non-public/local targets are out of scope, but supplies no further format or normalization guidance. Baseline 3 applies when the schema carries the load.

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 a precisely scoped resource (the Habilidades/SKILL.md agent-readiness item), even naming the exact well-known paths probed. That endpoint specificity is what separates it from siblings like bursia_check_llms_txt, bursia_check_agent_card, or bursia_check_agents_json without the agent needing to open any 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?

"Check one agent-readiness item" implies this is the granular, single-check tool versus the aggregate bursia_agent_readiness, but no alternative is named and no when-to-use/when-not condition is stated. The agent must infer the routing from the word "one".

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