pex_get_account_balance

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

No annotations are provided, so the description must carry full disclosure. It only implies read-only access via the verb 'Get' but fails to describe return format (currency, pending vs available balance), caching behavior, or real-time guarantees.

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 the action. Efficient structure but arguably too minimal—it sacrifices necessary behavioral details for brevity.

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?

Adequate for a single-parameter read operation, but lacks return value specification (balance format, currency) since no output schema exists. Does not compensate for missing annotations with additional operational context.

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 has 100% coverage with 'Account ID' clearly documented. The description adds minimal context by linking the ID to a 'specific cardholder', but does not elaborate on ID format or validation beyond the schema.

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?

Uses specific verb 'Get' and resource 'account balance'. However, it fails to distinguish from siblings like 'pex_get_account_details' or 'pex_get_account_remaining_limits', and uses 'cardholder' while the parameter is 'Account ID', creating slight ambiguity.

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?

Provides no guidance on when to use this tool versus alternatives like 'pex_get_account_details' or 'pex_get_all_account_details'. No conditions, prerequisites, or exclusions are mentioned.

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