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

With no annotations, the description carries the full behavioral burden, yet it says nothing about the return shape (period granularity, frequency, coverage), whether results are paginated, or any rate limits. The only behavioral clue is the region-level restriction for kabupaten/kota, which is more parameter semantics than behavior.

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 region-code detail is packed efficiently. It is a verbless fragment rather than a full sentence, but nothing is wasted and the key scoping information leads.

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?

There is no output schema and no annotations, so the description is the only source of context. It adequately covers the region_code semantics but leaves the return structure of a time series (period fields, frequency) unspecified, which is a meaningful gap for a data-retrieval 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?

Schema coverage is 100%, so the baseline is 3, but the description adds genuine meaning beyond the schema: it explains the three region_code forms (2-digit province, 5-char kabupaten/kota like 32.73, 00 for Indonesia) and, critically, that the kabupaten/kota level applies only to hdi_regency — a constraint the permissive schema pattern does not encode.

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+resource: the time series of one BPS indicator for one region, which distinguishes it in spirit from the sibling get_stat_values (latest values). However, it never names a sibling or explicitly contrasts with get_stat_values or list_stat_indicators, so an agent must infer the difference.

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?

There is no explicit when-to-use guidance, no conditions for choosing this over get_stat_values, and no mention of prerequisites such as resolving an indicator id via list_stat_indicators. Usage is only implied by the resource-level detail in the sentence.

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