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

No annotations are provided, so the description carries the full behavioral burden. It discloses the access-control requirement (needs kunci) and that it is internal-only, and the schema reinforces refusal/logging behavior, but it does not describe pagination, limits on 'latest', return shape, or any additional operational 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?

The description is a single compact sentence with the access restriction front-loaded, followed by the read purpose. Every phrase carries information and there is no filler.

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 one-parameter read tool with 100% schema coverage and no output schema, the description provides the essential purpose, audience, and authentication context. It could be slightly more complete by clarifying what 'latest' means or summarizing the returned content, but no critical calling information is missing.

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?

There is only one parameter, kunci, and schema description coverage is 100%. The schema already explains the key's origin and the refusal/logging consequence, so the description's brief mention that a kunci is needed adds little beyond the structured field; baseline 3 is appropriate.

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 uses a clear verb (Read) and names two specific resources: latest owner messages and TerTau journal titles. It also distinguishes the tool's audience by marking it OCKLU-internal and TerTau-agent-only, though it does not explicitly contrast it with sibling write/reply tools such as tertau_tulis or tertau_balas.

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?

It clearly states who may use it (TerTau agent only) and what it is for (reading latest owner messages and journal titles). The schema further explains that calls without the right kunci are refused and logged, giving strong context, but there is no explicit guidance on when to choose this over related sibling tools.

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