Read the last-known inventory snapshot for a fleet's members

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

Annotations already signal read-only, idempotent, and non-destructive behavior. The description adds useful behavioral detail beyond that: there is no live connection, the data comes from a prior POST refresh, and only the latest snapshot per host is available with no history. This is meaningful extra context.

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?

The description is two sentences with no filler. It front-loads the core purpose, then adds key behavioral constraints ('No live connection', 'latest-only per host, no history') without repeating annotations or schema information.

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 single-parameter, read-only tool with no output schema, the description is largely complete: it names the resource, explains the cached nature, and clarifies the lack of history. It does not describe the expected return shape or behavior when no snapshot exists, but the annotations and simplicity of the tool make this 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?

The schema has 0% description coverage, so the description carries the full burden of explaining the `id` parameter, but it never mentions what `id` refers to or how to determine it. The only hint is 'a fleet's members,' which implies `id` is a fleet ID, but the description itself adds no parameter guidance.

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 clearly states a specific verb ('Read') and resource ('last-known inventory snapshot for a fleet's members'). It distinguishes itself from the likely sibling refresh tool by explicitly noting 'No live connection' and 'reads back whatever the most recent POST refresh stored.'

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 gives clear context: this is the read-back side of a POST refresh operation, so an agent can infer it should be used when a cached/last-known snapshot is acceptable rather than live data. It does not explicitly name the refresh sibling or state when not to use this tool, so it stops short of a 5.

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