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

Annotations already declare idempotentHint=true, destructiveHint=false, and readOnlyHint=false, so the safety and retry profile is covered. The description adds one genuine behavioral fact beyond the annotations — that accepting grants a *fenced* lease (exclusivity) — but omits what happens on expiry, conflict, or invalid handoff, and the closing sentence about authorship is impressionistic.

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 sentences, front-loaded with the core action, so it is not bloated. However, the second sentence ('Checkpoints preserve continuity while authorship remains distinct') is jargon that describes the system rather than this tool's behavior and does not earn its place.

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, lease-acquiring tool with no output schema and only 33% parameter documentation, the definition is thin — it says nothing about what is returned, what the duration_seconds default/limits mean, or the failure modes. The lease concept is introduced but left unexplained.

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 only 33%: handoff_id and duration_seconds have no schema description, and the description mentions neither. Notably the 60–3600s lease duration parameter is never explained, so the description fails to compensate for the coverage gap.

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 ('Accept') and resource ('handoff') and adds the effect (acquiring a new fenced lease), which separates it from create_handoff and acquire_task_lease. It never names a sibling explicitly, so differentiation still requires the agent to infer from the name pairing.

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?

There is no indication of when to use this versus acquire_task_lease, create_handoff, or create_checkpoint, nor any precondition (e.g., that a handoff must already be offered and unexpired). Usage has to be guessed entirely from the tool name.

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