summarize_cluster_posture

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

No annotations are provided, so the description carries the behavioral burden. It implicitly signals a read-only aggregation and discloses the shape of the returned KPIs, but it says nothing about permissions, cost, latency, or whether any state is mutated — for a no-annotation tool that leaves real gaps.

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?

Front-loaded with the one-line purpose, followed by the KPI enumeration and a closing framing sentence. Every sentence is relevant, though the KPI list is somewhat verbose given an output schema already documents the return shape.

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 parameterless, read-only summary with an output schema present, the description covers purpose, audience, and headline outputs adequately. The main omission is the absence of usage routing against the many sibling inventory/risk tools.

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 tool takes zero parameters, so there is no parameter surface to document; the baseline for a 0-param tool is 4. Nothing in the description contradicts or complicates the empty schema.

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 ('summarize') and resource ('cluster's security posture') and enumerates the exact KPIs returned (total agents, enforcing vs. visibility-only, coverage percentage, agent type breakdown). It is clearly distinguishable from the sibling list_*/get_* tools, though it never names an alternative explicitly.

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 'fastest way to gauge blast-radius exposure' implies a high-level orientation use case, which is useful context. However, there is no explicit when-to-use vs. when-not guidance and no alternative sibling is named (e.g., when to prefer top_risky_flows or search_inventory for detail).

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