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

Annotations already declare readOnlyHint=false, idempotentHint=false, openWorldHint=true and destructiveHint=false, so the mutation profile is known. The description adds real context beyond that: it is a state-changing prerequisite for get_site_traffic and has a 1–2 minute propagation delay before data appears. It omits whether re-invocation is safe or what the enable operation returns, but the added latency and dependency disclosure is substantial.

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?

Three short sentences, front-loaded with the action and followed by the dependency and the timing caveat. Every sentence carries information an agent needs before calling.

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?

An output schema exists, so return values need not be explained, and the description covers the prerequisite, the follow-up call, and the latency window. For a low-complexity single-parameter toggle this is nearly complete, with only the already-enabled case left unspecified.

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 description coverage, the schema already defines site_name. The description adds nothing about accepted formats or how the site name relates to check_site_name/list_sites, so the baseline of 3 applies.

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 (Enable) and resource (HTTP traffic monitoring for a site), and explicitly names the sibling get_site_traffic as the consumer of the enabled state. An agent can distinguish this from the read-only traffic tools 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 sequencing guidance: call this first, then get_site_traffic returns live data, and wait 1–2 minutes in between. It does not state what happens if monitoring is already enabled or how to turn it off, so it falls short of full when/when-not coverage.

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