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

Annotations already declare a non-read-only, open-world, non-destructive mutation, and the description adds genuinely new behavior: lease renewal on running, downstream workflow triggering on completed, and a re-read-after-timeout posture. However it omits what happens on lease expiry or rejection and what an error response looks like, so the disclosure is solid but incomplete for a lease-bearing mutation.

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?

Four short sentences, front-loaded with the core action and each subsequent sentence carrying a distinct rule (status semantics, lease renewal, workflow side effect, retry advice). No filler, though the telegraphic phrasing and the language mismatch with the English tool name/title slightly raise parsing cost.

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 lease-based mutation with no output schema, the description covers side effects and completion discipline well. It still leaves the agent without the origin of leaseToken (presumably claim_collection), the meaning of 'id', or failure/retry error semantics, which is a meaningful gap given 4 required parameters and zero schema documentation.

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 0% for 5 parameters, so the description must carry the load; it partially does by explaining status values, message as a 'raison factuelle', checkpoint as progress, and leaseToken implicitly via lease renewal. The required 'id' parameter is never explained, and the mapping from prose to parameter names is implicit rather than explicit, leaving a real 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?

The description states a concrete action set: record progress/checkpoint, or terminate a run with completed/blocked/failed plus a factual reason. That is a specific verb+resource, and 'running renouvelle le bail' makes clear it also serves as a heartbeat. It does not distinguish this tool from near-siblings such as set_collection_state or claim_collection, which keeps it from a 5.

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 real conditional guidance per status: running renews the lease, completed may trigger configured workflows, and the agent must never mark completed without verifying results, plus re-read after a timeout. What is missing is any exclusion against alternative tools (set_collection_state, claim_collection) that touch the same collection lifecycle.

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