get_cluster_overview

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

Annotations already declare readOnly, openWorld, idempotent, and non-destructive behavior, so the description carries a lighter burden. It adds useful context about what the snapshot contains and notes the SHOW HOSTS source, but does not disclose additional behavioral traits such as latency, staleness, or session dependence.

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 a single, compact sentence that front-loads the core concept (cluster snapshot) and then lists specific contents. Every part contributes information without redundancy.

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?

Given the zero-parameter signature, rich annotations, and presence of an output schema, the description is sufficiently complete. It tells an agent what data to expect, though it could slightly expand on how the snapshot relates to the active session or cluster state.

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 has zero parameters, so there is nothing for the description to clarify beyond the schema. The baseline of 4 applies because no parameter documentation is needed.

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 identifies the tool as a cluster snapshot and enumerates its contents: Impala version, current database, database list, and impalad hosts. This distinguishes it from more narrowly scoped siblings like get_db_list, though it does not explicitly name a sibling or use a strong verb.

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 "Cluster snapshot" implies use when an agent needs a high-level cluster overview rather than a specific resource detail. However, there is no explicit when-to-use or when-not-to-use guidance or mention of alternatives.

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