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 covered. The description adds one genuine behavioral fact not in the annotations: using api_token narrows the result to a single site, and it flags an OAuth-vs-token auth requirement. That is useful context, but the rest is thin.

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?

Two short sentences with the primary action front-loaded and zero filler. The second sentence is telegraphic enough ('api_token ile tek site') that the subject/predicate must be inferred, costing a little clarity without bloating the text.

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?

The tool is simple: one optional parameter at 100% schema coverage and an output schema that already documents the return shape. Purpose plus auth behavior is therefore sufficient, and nothing an agent needs to call it correctly 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?

Schema coverage is 100% and the single parameter is well documented there, so the baseline is 3. The description goes one step further by explaining the functional consequence of supplying api_token (only one site returned), which is semantics an agent cannot read off the schema.

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?

Names a specific verb and resource ('Erisebildigin siteleri goster' = show the sites you can access) and even enumerates the returned fields (id, ad, adres), so the agent knows exactly what it gets. It does not differentiate itself from siblings (gunluk_ozet, kirik_linkler, oneriler), which keeps it short of a 5.

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?

The conditional 'OAuth yoksa api_token ile tek site' is real usage guidance about which auth path to take and what that choice implies. However, it says nothing about when this tool is preferable to the sibling tools, so guidance is implied rather than complete.

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