decode_base64

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

The description accurately reflects the tool's behavior: one-way transformation. No hidden side effects. Annotations confirm readOnlyHint=false (mutates nothing). For a stateless decode operation, this is fully transparent.

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?

Two sentences: first states purpose, second provides a clear example. No redundant words. Efficient 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?

Despite no output schema, the description implies a plain-text output. For a simple decoding tool, this is sufficient. All necessary information is present given the tool's limited complexity.

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 provides 100% parameter description ('Base64 text to decode'). The example adds value by showing expected input/output format, going beyond the schema's minimal description.

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 tool decodes Base64 text to original text, using a specific verb ('Decode') and resource ('Base64 text'). The example provides concrete illustration. It distinguishes from sibling tools like encode_base64, decode_url, etc.

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?

No explicit when-to-use or when-not-to-use guidance. Context implies it's for Base64 decoding, but no mention of alternatives or prerequisites. Adequate for a simple tool but lacks explicit differentiation.

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