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

Annotations already declare destructiveHint=true and idempotentHint=true, and the description goes further: it explains what is actually affected (what the site's analytics records), that discarded visits are never stored or counted, that an empty array wipes the board, and the required scope. It also adds a client-side confirmation protocol that annotations cannot express.

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?

Four tight sentences with the destructive warning and the replacement semantics front-loaded, followed by the confirmation gate and the scope requirement. No filler and no repetition.

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 3-parameter destructive mutation with no output schema, everything an agent needs is present: what is replaced, what destruction means, the empty-array edge case, the auth scope, and the human-approval requirement. Nothing material is left to inference.

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 100%, so the schema already documents productKey, paths (full replacement, max 25, empty clears), and confirm. The description's statements about empty arrays and the confirm gate restate schema semantics rather than adding new meaning, so baseline 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 and resource — "Replace the per-product Excluded pages board" — and immediately defines the resource's effect ("paths whose visits are discarded at intake"). No sibling tool in the list deals with exclusion boards, so an agent can distinguish it unambiguously.

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 explicit preconditions: requires a submit-scope key, empty array clears the board, and confirm=true only after the owner approves the exact list in conversation. It does not name any alternative tool, but no sibling covers this capability, so the routing gap is minimal.

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