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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world). The description adds real value beyond that by disclosing the scoring methodology: dual-source cross-checking, sub-1 GHz bands weighted double, and the 60 percent threshold for 'good'.

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 action is front-loaded, but the whole description is one long run-on sentence that crams the scoring rules together, making them hard to parse. It is dense rather than genuinely tight.

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 carries the return-value burden and does describe the verdict plus missing bands per network, along with the rules used. It stops short of describing result shape or ordering, but is sufficient to call the tool correctly.

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?

Schema description coverage is 100%, so the schema already documents lte_bands, nr_bands, and countries with examples and the 10-country limit. The description only restates that NR is optional, adding no syntax or format detail; baseline 3 applies.

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+resource: paste LTE/5G NR bands and get a per-network verdict for one or more countries, including missing bands. Clear what it does, but it does not explicitly differentiate itself from siblings like check_device or get_country_networks.

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 usage context is implied by the input shape (you supply a band list and countries), but there is no explicit when-to-use/when-not guidance and no pointer to alternatives such as check_device. An agent can infer the case but receives no routing help.

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