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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description only adds the raw endpoint path ('GET /v1/takvim/gun'), which tells the agent nothing about output shape, default date behavior when tarih is omitted, or any external-data limitations.

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?

It is short and front-loads the returned fields, which is good. But 'Her pakette' is unexplained filler and the raw endpoint path occupies space without adding decision-relevant information.

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 and 0% parameter coverage, the description carries the full burden, and it only partially compensates by listing the returned fields. It leaves the default-date behavior and the distinction from takvim_tatiller undefined for a date-dependent lookup 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 description coverage is 0% for the single 'tarih' parameter, and the description never mentions it. The agent cannot tell from either source what happens if tarih is omitted (required count is 0), nor the expected date format beyond the schema's format hint.

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 names the resource and the three data points it returns (week number, business day, holiday), which is informative about content. However there is no verb, and it does not distinguish this from the sibling takvim_tatiller, which an agent could easily confuse with it.

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 guidance on when to use this versus takvim_tatiller or any other calendar-related sibling. The phrase 'Her pakette' ("in every package") conveys no actionable usage condition and is never explained.

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