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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, and the description adds real value on top by disclosing the return payload shape: status, latest build or question, and recent chat activity. It stops short of covering error behavior or whether chat history is truncated, which keeps it off a 5.

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 sentences, no waste, with the usage trigger front-loaded ahead of the return-value summary. Every clause earns its place.

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 one-parameter read with no output schema, the description does the heavy lifting by describing what comes back, so an agent can decide and act. The remaining gap is procedural — how to obtain a valid site_id — which matters given the crowded sibling set including list-sites.

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 0% for the single required site_id parameter, so the description must compensate and it does not — it never says what form the id takes or that it can be obtained from list-sites. The phrase 'one of their WebTwizz sites' only implies that an identifier is required, which is already visible in the schema's required list.

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+resource combination ('get-site' → returns the site's status, latest build or question, and recent chat) and enumerates exactly what 'current state' means. It does not name a sibling such as list-sites or edit-site, so differentiation relies on the agent's own comparison of the tool list.

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, concrete trigger conditions: 'when the user asks how one of their WebTwizz sites is going, what changed, whether it is live, or anything else about its current state.' That covers the main entry scenarios well, but there are no exclusions and no pointer to alternatives (e.g. use list-sites to find the id, or update-site to change something).

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