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

Beyond annotations (readOnlyHint=false, idempotentHint=true, destructiveHint=false), the description adds real value: despite being a write, it performs local selection only, creates no supplier pending change, takes no payment, and requires owner-prepared fresh terms. It also discloses the return value (a link bound to the proposal ID). This is strong behavioral context, though idempotency is only covered by annotation.

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 front-loaded sentences lead with the action, then the return value, then the scope limitation and owner obligation. Every sentence earns its place, with no 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 multi-step, mutating workflow tool with no output schema and no parameter documentation, the description fills in behavioral scope and return-value context well. It still leaves the five required identifiers unexplained, which is a meaningful gap for an agent assembling the call.

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?

There are 5 required parameters with 0% schema description coverage, so the description must carry the semantic load but largely does not. It only loosely gestures at offer_id (exact offer), permission_id (this permission's search), and change_search_id (change search), while handoff_id and idempotency_key receive no explanation at all.

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 states a specific verb and resource: save an exact offer from the change search for owner review, returning a link bound to the proposal ID. This clearly distinguishes it from the search sibling (evuun_search_travel_changes) and from confirmation/payment steps. It does not name siblings explicitly, keeping it just short of top marks.

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 implies usage: this is the step after a change search that selects an offer for owner review, and it explicitly excludes supplier pending change, payment, or confirmation. However, it never names which sibling tool to use instead for confirmation or payment, so the when-to-use routing is only implied.

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