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 without the description. The description adds that rates come either live from the Grand Bazaar or from a reference source, which is genuine behavioral context about data provenance, but it says nothing about rate freshness, rounding, or failure modes for unsupported currency codes.

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-loaded, but almost every token duplicates the title or is a bare endpoint path plus a plan-availability note. There is no wasted verbosity, yet little of the text earns its place as agent-facing guidance.

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 four parameters, three required, zero schema descriptions, and no output schema, the definition should explain what the call returns and what each currency field expects. Instead it offers an endpoint path and a plan note, so an agent must guess at code format expectations and conversion semantics.

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%, so the description must carry meaning for four parameters, and it largely does not: 'miktar', 'kaynak' and 'hedef' are undocumented in both places, and only the 'anlik'/'referans' distinction in the title loosely maps to the 'tur' enum. The three-character currency-code constraint and the amount bounds are left entirely to the schema's pattern and length rules.

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 title/description identifies a currency converter and mentions live Grand Bazaar versus reference rates with TRY support, which is a concrete verb+resource. However, the description body itself only repeats the title and appends an endpoint path, and it never distinguishes this tool from the sibling 'doviz' (rate lookup) or 'doviz_gecmis' (historical rates), leaving the agent to infer that this one converts an amount.

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 when-to-use guidance: nothing says to pick this over 'doviz' when the user wants a converted amount rather than a rate list, and no prerequisites or edge conditions are stated. The only contextual note, 'Her pakette' (available in every plan), speaks to availability, not usage selection.

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