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

Annotations only declare readOnlyHint=false, destructiveHint=false and openWorldHint=false; the description adds the substantive behavior that a claim is a non-exclusive mark rather than a lock, so it does not block other claimants. It also discloses the governance rule governing autonomous sessions versus human decisions, which no structured field conveys. The remaining gap is small (no statement on releasing or expiring a claim, which arroway_withdraw presumably handles).

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 tightly packed sentences with the primary instruction front-loaded and the addressing rule following as a qualifier. Nothing is redundant, though the second sentence crams two conditional branches and an autonomy policy into one line, which costs a little readability.

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 three-parameter, non-destructive write with no output schema, the description covers intent, timing, and authorization boundaries well. It does not say what a successful claim yields or how a claim is later released or superseded, which an agent coordinating with arroway_withdraw or arroway_continue would benefit from knowing.

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 description coverage is 100%, and the schema already explains all three fields, including that 'note' is who is taking it and 'handoff' accepts a #handle or full id. The description adds no format, default, or constraint information beyond that. Baseline 3 is appropriate when the schema carries the parameter burden.

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: mark that you are taking an open handoff. It also clarifies the conceptual model ('a claim is a mark, never a lock'), which sharpens what the operation actually is. It does not name a sibling tool to contrast with (e.g. arroway_continue or arroway_withdraw), so an agent must infer the boundary from the shared 'arroway_' family.

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 timing ('BEFORE working on it') and an explicit decision rule with both branches: if the handoff is addressed to your user, take it; if addressed to someone else, only a human in this conversation can decide, and an autonomous session must leave it. This is a genuine when-to-use / when-not-to-use split with an autonomy constraint, not just implied context.

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