acquire_control

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

With no annotations, the description must carry the safety and behavior profile, and it does convey the core model: this is a shared, mutually exclusive write lease that can be renewed with a token. However, it does not say what happens on contention (fail, block, queue), how long a lease lasts, or whether an expired lease is reclaimable, which are the behaviors that matter most for a lease primitive.

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?

A single sentence with the primary action front-loaded and the renewal variant trailing. No filler, no restatement of the tool name, and nothing an agent must skim past.

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?

No annotations and no output schema mean the description is the only source of behavioral context, yet it omits contention handling, lease lifetime/expiry, what the tool returns (presumably a token), and the meaning of the undocumented owner parameter. For a mutual-exclusion primitive this leaves an agent guessing on the details that determine correct usage.

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 50%: the lease parameter is documented in the schema as 'Token returned by acquire_control,' while owner has no description anywhere. The description mentions the token only in passing and never explains owner, so it fails to compensate for the coverage gap on half the parameters.

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 pair and resource: 'claim the shared write lease or renew it.' An agent can tell this is a lease-acquisition tool, and the sibling name release_control makes the acquire/release split inferable. It stops short of naming the alternative explicitly, so it is clear but not sibling-differentiating in the description text itself.

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?

The description distinguishes two modes of use: a first-time claim, versus a renewal where the caller must 'pass the existing token.' That is useful implicit guidance about which path to take. It offers no exclusions or explicit routing to release_control, and no prerequisite context for when a caller should attempt acquisition at all.

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