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

No annotations are supplied, so the description carries the burden, and it does establish that this is a fixed informational payload rather than a lookup that varies by input. It does not describe the return format, language, or whether the facts are static or cached, and 'planos do Chico' is left unexplained, which is a real ambiguity about what that section contains.

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?

A single front-loaded sentence with no filler; the topic enumeration is dense but every item carries informational weight for an agent deciding whether to call. Slightly list-heavy phrasing rather than a clean statement of intent keeps it from a 5.

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?

With no output schema, the description must signal what comes back, and the topic list largely does that for a zero-parameter info tool. The main gap is the unexplained 'planos do Chico' and no hint about response shape or size.

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 meaning to add; baseline 4 applies. Nothing in the description misleads about inputs, and additionalProperties: false confirms the no-arg contract.

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 names the resource precisely (official ASTTEC facts) and enumerates the exact topics returned: what it does, target audience, how it works, plans, address, contact, and citation guidance. An agent can tell this apart from ler_pagina or listar_segmentos because it is a static institutional fact sheet rather than page retrieval or segment listing. It lacks an explicit verb and never names the siblings, so it stops short of 5.

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?

Usage is only implied by the enumerated content: an agent can infer it should call this for questions about the company, its plans, address, or citation format. There is no statement of when to prefer it over ler_pagina or pedir_diagnostico, and no prerequisites or exclusions are given.

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