get_categories

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

With no annotations provided, the description carries full responsibility for disclosing behavior. It only states 'Get all available categories,' which implies a read-only list operation but does not disclose response format, pagination, auth requirements, or how the optional includeUsageStats parameter affects results. Minimal transparency beyond the most basic intent.

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?

The description is a single, front-loaded phrase with zero redundant words. 'Get all available categories' is concise and efficient, containing only essential information. There is no padding or unnecessary filler, making it highly concise and well-structured.

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 list tool with one optional parameter and no output schema, the description gives a basic idea of the function. However, it omits any mention of the optional parameter's effect or what the response contains, which is notable since there is no output schema to fill that gap. It is adequate but lacks some context, justifying a mid-range score.

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?

The schema fully documents the sole parameter 'includeUsageStats' with a description, and schema coverage is 100%. The description does not add any additional meaning about the parameter, which is acceptable when the schema already provides complete coverage. Baseline 3 is appropriate since no extra parameter context is offered.

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 description 'Get all available categories' uses a specific verb and resource, clearly indicating the tool fetches categories. It distinguishes from siblings like get_accounts or get_transactions, as no other tool in the sibling set is dedicated to listing categories. The inclusion of 'all' clarifies scope, making the purpose unambiguous.

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 provides no context about when to use this tool or how it compares to alternatives. There is no mention of prerequisites, typical use cases, or exclusions (e.g., 'use this before categorizing a transaction'). The usage is only implied by the tool name, but the description itself offers no guidance.

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