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

Annotations already declare the tool read-only and non-destructive, and the description adds useful behavioral and output context: each program includes a cited source URL, last-verified date, and apply-guide link. It does not contradict the annotaations and provides value beyond what the annotations alone convey.

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 tight sentences front-load the primary purpose, then cover output fields and optional filtering without wasted words. Every sentence earns its place by helping an agent select and invoke the tool correctly.

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 filtered list tool with read-only annotations, this description is largely complete: it covers the input, optional filters, and the key returned fields even without an output schema. It lacks explicit alternatives/error behavior and no-results handling, which keeps it just shy of perfect.

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?

Term: 3, schema description coverage is 100%, so the schema already fully documents zip, level, and category. The description adds a little extra semantic color around jurisdiction level and category keyword matching, but it does not substantially go beyond the schema's own 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?

Clearly states the action (list) and resource (federal, state, and county senior-benefit programs) and the key input (ZIP). It implicitly contrasts with siblings such as get_program_details and run_eligibility_scan but does not explicitly name them, so it stops short of full sibling differentiation.

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 description conveys the use case—when you have a ZIP code and need applicable programs—and mentions optional filters, so usage is inferable. However, it does not state when not to use this tool or explicitly route the agent to a sibling for details or eligibility scans.

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