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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered without the description. The description adds only scope ('a regency', 'an entire month') and says nothing about response shape, month boundary handling, or whether the current/partial month is included.

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. It is arguably too terse rather than verbose, but nothing in it is wasted.

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?

For a simple three-parameter read tool with no output schema, the description covers the core intent but omits valid-id sourcing for kabupaten_id and any hint of what a monthly result contains (per-day entries vs. aggregate), which an agent would need to use the output 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 coverage is 67%; bulan and tahun are documented in the schema, while kabupaten_id is undocumented there. The description's phrase 'for a regency' partially compensates by mapping to kabupaten_id, but it never states the id format or a source for valid ids.

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?

Specific verb (get) and resource (prayer times) with scope modifiers ('for a regency', 'for an entire month') that implicitly separate it from the daily sibling sholat_harian. It stops short of naming the sibling, so an agent must infer the distinction from 'entire month'.

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 guidance, no mention of sholat_harian as the daily alternative, and no note that kabupaten_id should come from a lookup tool such as sholat_list_kota or wilayah_list_kabupaten. Usage is only implied by the word 'monthly'.

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