explain_834_code

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

No annotations are supplied, so the description carries the full disclosure burden, and it does state the listing behavior when no code is given. However, it never confirms this is a pure read-only lookup with no side effects, and the omit-code behavior duplicates what the schema parameter description already says.

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 dual-purpose statement is front-loaded and useful, but roughly half the text is a twelve-item table list that duplicates the schema enum verbatim, making the definition longer than necessary without adding information.

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?

This is a simple two-parameter lookup with no output schema, and the description plus the fully documented schema covers the essential mechanics. Only the absence of any note on return shape or case handling keeps it below full marks.

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% and both parameters are documented, including the enum of tables and the omit-to-list rule. The description's enumeration of tables merely restates the schema enum rather than adding format, case-sensitivity, or fallback guidance.

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 gives a specific verb+resource pair ('Explain an 834 code') plus the alternate mode ('list a whole code table'), which is enough to tell it apart from siblings like validate_834 or summarize_834. It does not explicitly contrast itself with those siblings, which keeps it from a 5.

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?

Usage is implied by the two-mode phrasing: supply a code to explain it, or omit the code to list a table. No explicit when-to-use/when-not guidance or named alternatives are given, leaving the agent to infer routing.

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