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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and closed-world, so the safety profile is covered. The description adds useful traits ('runnable', 'signed', format-dependent output), but sits in mild tension with readOnlyHint because a POST that assembles and signs a bundle plausibly creates an artifact; that ambiguity is left unresolved rather than contradicted outright.

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 short sentences, front-loaded with the action and resource, then the endpoint and the only non-obvious parameter constraint. Nothing is redundant or padded.

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?

There is no output schema, so the description should say something about what the bundle is or what the call returns (bundle location, signing details, whether it is downloadable). It covers the invocation well but leaves the result side entirely to inference.

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 100%, so the baseline is 3; the description nevertheless reinforces the only meaningful parameter by restating that format accepts compose or kustomize, with compose as the default. It adds no semantics for the three required IDs, but the schema already labels them required.

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: 'assemble a runnable, signed export bundle', plus the endpoint it targets. Clear what it produces, though it does not differentiate itself from similar artifact-producing siblings like backup.create or deploy.run.

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 endpoint and format default imply usage, and naming 'compose (default) or kustomize' gives the agent a concrete choice when calling. There is no explicit when-to-use guidance, no prerequisites (e.g. permissions, environment state), and no mention of alternatives such as backup.create.

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