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

Annotations already indicate readOnlyHint=true, idempotentHint=true, destructiveHint=false, covering safety. Description adds context about document types included (NCDs, NCAs, etc.) and that documents are 'published or updated', which aligns with behavioral expectations.

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?

Single sentence, front-loaded with key intent, no redundant information. Every word earns its place.

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?

Output schema exists (not shown but stated), so return values are covered. Description lists document types and scope (national Medicare documents). Could mention ordering or pagination but is adequate for a simple list tool with clear annotations.

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 67% (2 of 3 parameters described). Description does not add any parameter-specific meaning beyond the schema; it does not mention the 'days', 'limit', or 'document_type' parameters. It does not compensate for the missing description of the 'limit' parameter.

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?

Description clearly states it returns 'recently published or updated national Medicare coverage documents from CMS' and lists specific document types like NCDs, NCAs, CALs, etc. This distinguishes it from sibling tools that focus on individual document types or search.

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?

Description implies use for recent changes across multiple document types but does not explicitly contrast with sibling tools like medicare_ncd_search or medicare_lcd_search. No guidance on when not to use this tool.

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