Estadísticas del sistema

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

The readOnlyHint=true and destructiveHint=false annotations already convey this is a safe read operation. The description adds the context that it covers specific content areas (paraderos, recorridos, viajes, modos), which gives the agent an understanding of what scope the stats cover. With annotations covering the safety profile, this is adequate. No contradiction found.

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 short sentence that is efficient and front-loaded with the resource name (Estadísticas del sistema). It lists the covered content areas concisely. It could perhaps benefit from a note on the return format or scope, but for a zero-parameter stats tool, it's appropriately brief.

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?

The tool has an output schema (which per rubric means return values needn't be explained), 0 parameters, and read-only annotations. However, the description doesn't clarify what 'estadísticas' means precisely — counts? aggregates over time? current values? It also doesn't distinguish itself from get_gtfs_status. For a simple stats tool with no params and good annotations, this is mostly complete but could briefly clarify scope or units.

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 0 parameters, and the schema coverage is 100%. Per the rubric, 0 params earns a baseline of 4. There are no parameters requiring explanation, so the description doesn't need to elaborate on parameter semantics. The description appropriately describes what the stats contain without needing param details.

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 the tool returns 'Estadísticas del dataset GTFS' (GTFS dataset statistics) with a list of content areas (paraderos/stops, recorridos/routes, viajes/trips, modos/modes). It's clear enough about what it returns, but it doesn't specifically differentiate from sibling tools like get_gtfs_status, which may also return data about system state. The verb 'get' plus the clear resource improves clarity.

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?

No guidance is given about when to use this tool versus alternatives. Notably, get_gtfs_status is a sibling tool that likely provides related system status information, and there's no differentiation between them. The description doesn't mention prerequisites, context, or when this would be preferred over other tools. A brief 'use to get a quick overview of the GTFS dataset' or distinction from status tools would help.

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