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

Annotations already declare this is a non-read-only, non-idempotent, non-destructive mutation. Beyond that, the description adds real behavioral context: an authorization constraint (signed-in person, not an API key), a concurrency precondition (the text must still be the offer's 'before'), and a side effect (the underlying reasons are 'absorbed, and no run reads them again'). These are meaningful traits the annotations do not supply.

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?

It is reasonably compact (three sentences) and front-loads the primary action, but the heavy reliance on coined terms ('takes one', 'after', 'before', 'absorbed') makes the structure hard to parse and forces re-reading that a plainer phrasing would avoid. The sentences are not wasteful so much as cryptic.

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 mutating tool with no output schema, the description covers authorization, the precondition, and the side effect well. It does not say what the agent receives on success, whether the change is reversible, or what happens if the 'before' precondition has failed, leaving the post-invocation picture incomplete.

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 baseline is 3, but the description genuinely clarifies the optional 'text' parameter's role: when provided it uses 'the person's own whole text in its place', otherwise the offer's after-text is used. That conditional behavior is not expressed in the schema and adds meaning beyond the two field descriptions.

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 conveys the core action — accepting a text change that 'Tommo offered' so 'the text becomes the offer's after' — which an agent can roughly map to accepting a proposed edit, and the sibling 'refuse_a_text_change' implies the opposite branch. But the invented vocabulary ('offer's after', 'the offer's before', 'the reasons it rests on are then absorbed') forces the agent to decode rather than immediately recognize the verb+resource, leaving purpose only inferred.

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 states two preconditions — 'Only a signed-in person takes one; a key cannot' and 'only while the text is still the offer's before' — which tell the agent when the call is valid. However, it never names the alternative action (refuse_a_text_change) or explains when to accept versus refuse, so the routing guidance is only implied.

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