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

Adds substantial context beyond destructiveHint=true and readOnlyHint=false: it discloses that nothing is deleted, that a 'withdrawn' journal line is appended after the approval it answers with the supplied note, and that the effect cascades — an older approved edition comes back into force if no other approval stands on that edition, or none does. That is exactly the side-effect disclosure a mutation tool needs.

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?

Very short and front-loaded — the action and actor scope come first, then the defaulting rule, then the side effect. Some clauses are compressed to the point of being slightly cryptic ('or none'), but no sentence is filler.

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 four-parameter mutation with no output schema, the description covers authorization, default resolution, side effects, and reversibility consequences of the state change. An agent has everything needed to call it correctly and to explain the result — nothing material is missing.

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 baseline is 3, but the description genuinely extends it: 'who' is framed as whose approval stands, 'version' is not just an edition id but the edition that person's approval currently rests on, and 'note' is tied to the journal line it accompanies. The cascade rule in particular is semantics the schema does not carry.

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 ('Take an approval ... back') and resource (wiki page approval), and immediately scopes the two modes: your own approval, or someone else's if you are the project's lead. That is clearly distinguishable from approve_wiki_page, ask_wiki_page_approval and get_wiki_page_approval.

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?

It gives the condition that selects the 'who' mode (project lead acting on somebody else's approval) and the default resolution rule when 'version' is omitted. What it lacks is an explicit pointer to the sibling to use instead when you want to grant rather than retract an approval, so it is clear context without full routing.

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