Brex MCP Server

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

With no annotations provided, the description carries full burden and does well by disclosing key behavioral traits: it lists only finalized statements, supports cursor-based pagination, and returns complete statement objects. However, it doesn't mention rate limits, authentication requirements, or error conditions, leaving some gaps for a read operation.

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 perfectly concise and front-loaded: two sentences that efficiently convey purpose, pagination support, and return format without any wasted words. Every sentence adds essential information, making it easy for an agent to parse quickly.

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?

Given the tool's moderate complexity (list operation with pagination), no annotations, and no output schema, the description is reasonably complete. It covers what the tool does, pagination behavior, and return content, though it could benefit from mentioning authentication or error handling to be fully comprehensive.

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 description coverage is 100%, so the schema already fully documents both parameters (cursor and limit). The description adds no additional parameter semantics beyond what's in the schema, maintaining the baseline score of 3 for adequate but not enhanced parameter explanation.

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 clearly states the specific action ('List all finalized statements'), resource ('primary card account'), and scope ('complete statement objects with period dates, balances, and payment information'). It distinguishes from siblings like get_cash_account_statements by specifying 'primary card account' and from get_card_transactions by focusing on statements rather than individual transactions.

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 implies usage for retrieving finalized statements from the primary card account, but doesn't explicitly state when to use this tool versus alternatives like get_cash_account_statements or get_card_transactions. No guidance is provided on prerequisites, exclusions, or specific scenarios where this tool is preferred over siblings.

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