pause_transfer

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

Annotations already declare this is a non-read-only, non-idempotent, non-destructive mutation, and the description adds genuinely useful context that the checkpoint survives the pause. It does not disclose behavior on redundant calls (already-paused transfer), whether the pause is immediate or graceful, or what state the transfer transitions to.

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 front-loaded sentence — verb, resource, and the critical state guarantee — with zero 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 one-parameter mutation with an output schema and full annotation coverage, the description covers purpose and the main side-effect concern (checkpoint retention). Only edge-case behavior and parameter provenance are left unaddressed, which is a minor gap.

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 0% for the single job_id parameter, so the description must carry the burden, and it says nothing about where the id comes from or what form it takes. The name is largely self-explanatory for a one-parameter tool, which limits the harm, but no added meaning is provided.

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 ('Pause a running transfer') and adds the key state consequence ('preserving its checkpoint'), which distinguishes it from cancel_transfer. It references resume_transfer by name, so an agent can place it in the pause/resume pair, though it never explicitly contrasts itself with cancel_transfer.

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 phrase 'for resume_transfer' implies the intended workflow — pause only when you plan to resume — but there is no explicit when-to-use/when-not-to-use statement or precondition (e.g. 'only valid on transfers in running state'). Usage must be inferred from the checkpoint hint.

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