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

Annotations already cover readOnly, idempotent, and non-destructive behavior, so the bar is lower. The description adds useful context beyond them: it flags PHI sensitivity, discloses that both current and discontinued entries appear by default, and gives the underlying endpoint. It stops short of describing pagination mechanics or return format.

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?

Front-loads the verb and resource, then the returned fields. The field enumeration is somewhat long but each item earns its place as return-value documentation given the absence of an output schema. The trailing endpoint is compact.

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 read-only list tool with full annotation coverage and complete schema descriptions, this is nearly complete. The field enumeration substitutes for the missing output schema, so an agent knows roughly what comes back. Minor gaps remain around pagination/return structure.

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%, so the schema already documents all six parameters, establishing a baseline of 3. The description adds value by explaining the default filtering behavior ('both appear unless you filter'), which contextualizes the permanent and discontinued flags beyond their schema descriptions.

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?

States a specific verb (List) and resource (medication documents) scoped to one patient, and enumerates the fields returned. It is trivially distinguishable from siblings like list_allergies, list_problems, and list_vitals.

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?

It clarifies the default result set ('current and discontinued entries both appear unless you filter'), which tells the agent when filtering is needed. However, it does not name alternative tools or explicit when-not conditions, so guidance is clear but not routing-level.

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