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 adds that results are paged and names the underlying endpoint, but says nothing about total counts, page limits, or what a tax record contains.

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?

Three terse fragments with the resource front-loaded and no filler. The 'GET /taxes' endpoint note earns marginal keep for agents that map to HTTP, but it is telegraphic rather than explanatory.

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 two-parameter read-only list tool with full schema coverage, the description is minimally adequate. With no output schema, it doesn't describe what fields a tax record exposes (rate, code, whether it's a VAT/withholding type), leaving the agent to infer the return shape.

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 both parameters (page, page_size) are fully documented in the schema, including the 'use next_page from the previous reply' guidance. The description's only contribution is the word 'Paged', which duplicates rather than extends that.

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 the resource specifically ('the company's tax rates') and gives concrete examples (PPN, PPh) that disambiguate it from the many other list_* siblings. It lacks an explicit verb like 'list' and relies on 'Paged' plus the tool name to convey it returns a collection.

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 statement of when to use this versus alternatives (e.g., other lookups for tax-related data) and no prerequisites or exclusions. The only usage signal is the implied 'Paged' hint about iterating pages.

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