get_fleet_summary

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

There are no annotations, so the description carries the full burden of behavioral disclosure. 'Get' implies a read-only operation, and the key_label line discloses scoping behavior. Still, it does not explicitly state safety/non-mutating guarantees, permissions, rate limits, or what happens when key_label is omitted.

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 compact and front-loaded: the core purpose appears first, followed by a short usage context and a parameter explanation. Every sentence contributes useful information with no filler or redundant restatement of the tool name.

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 low complexity, presence of an output schema, and single optional parameter, the description is largely complete for an agent to invoke the tool correctly. The main gap is that it does not explicitly describe the default scope when key_label is omitted, and it offers no guidance on when not to use this tool.

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 input schema provides only the key_label name with no description, so the description meaningfully compensates by explaining that it scopes the summary to consoles visible to a specific API key. It leaves some ambiguity about accepted string formats and the default behavior when the parameter is null, but it adds real semantic value beyond the 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?

The description states a specific verb and resource ('Get a high-level fleet summary') and describes the output ('host, site, and device counts with status breakdowns'). It conveys the tool's purpose clearly, but it does not explicitly differentiate it from potentially overlapping siblings such as list_all_sites_aggregated or get_site_health_summary.

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 'Useful for a quick overview of the entire UniFi deployment' provides clear context for when to use this tool. However, it does not mention any alternatives, exclusions, or cases where a more detailed or different summary tool should be preferred.

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