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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the agent knows this can destroy state. The description adds one genuinely useful behavioral fact beyond that: removal requires expectedSiteKey, implying a guard/optimistic-concurrency check. It does not disclose what removal actually breaks (e.g., disabling the Crayon integration) or what association does on success.

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 short, front-loaded sentences with no filler; the operation scope comes first and the conditional constraint second. It is arguably over-terse for a destructive dual-mode tool, but nothing is wasted.

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 destructive connect/disconnect tool with zero schema documentation and no output schema, the description leaves key gaps: it does not say how association differs from removal in effect, what happens to the existing connection when the key is removed, or whether expectedSiteKey is forbidden or ignored on association. The single conditional sentence is not enough to call this safely.

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 coverage is 0%, so both parameters are bare strings in the schema and the description must compensate. It explains expectedSiteKey as a removal-only requirement, which is real added semantics, but it never explains what siteKey is (the site's public key value? a site identifier?) nor the consequence of a mismatched expectedSiteKey.

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?

The description names a specific resource (the Crayon site public key) and a specific pair of operations (associate / remove), so an agent knows what the tool touches. It does not differentiate itself from siblings such as configure_connection, remove_connection, or connect_form_collection, which is the only reason it stops short of a 5.

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?

There is no explicit when-to-use guidance and no named alternative. The only routing hint is implicit: 'Le retrait exige expectedSiteKey' suggests the presence of expectedSiteKey selects removal mode, but the agent must infer that, and nothing says when to prefer this tool over remove_connection or configure_connection.

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