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

With no annotations, the description carries the full burden and does well: it discloses row ordering (oldest first), that each row carries a source instrument and URL, and the source_instrument prefix conventions ('Portal' = open-data, 'BPS table' = fallback with no decree number or effective date). It stops short of describing pagination or error behavior, but the return semantics are unusually well covered for a read tool.

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 purpose is front-loaded in the first clause, but the body is a very long enumeration of provinces, regions and year ranges that reads like a data-coverage catalogue rather than tool guidance. Much of it earns its place by signalling availability per region, but the granular lists (e.g. naming twelve Lampung regions) are bloated for a tool description.

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 must explain return values, and it does: row shape, ordering, source instrument and URL, and the BPS-table fallback quirk. Combined with the coverage map, an agent has enough to know what a call will return for a given regency.

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% and the single regency_code parameter is fully documented in the schema. The description only implies the parameter via 'for one kabupaten/kota' and adds no format detail beyond the schema pattern, so the 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?

The description states a specific verb and resource: it returns every loaded year of UMK for one kabupaten/kota, ordered oldest first, with source instrument and URL. An agent can distinguish it from get_umk (single value) and get_ump_history (provincial), though it never names those siblings explicitly.

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 or when-not-to-use guidance and no named alternative. The long region list describes data coverage, not when an agent should pick this tool over get_umk or get_ump_history, leaving the routing decision to inference.

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