encode_ascii

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

No annotations are provided, so the description bears full responsibility for behavioral disclosure. It explains the two modes and decode's support for decimal/0x-prefixed hex, but omits edge cases like handling of non-ASCII characters, invalid input, or exact output formatting for encode (e.g., whether hex uses 0x prefix).

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 extremely concise, contained in one sentence with a clear front-loaded purpose. Every part adds essential value: the core operation, the two modes, and the supported numeric bases for decode.

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 tool with no output schema, the description covers the main operation, actions, and decode input formats. It lacks explicit details on the exact encoded output representation and error behavior, but given the tool's simplicity, it is nearly complete.

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 only 33% (format described), but the tool description adds meaning to 'action' (encode vs decode) and 'format' (output format), and clarifies decode's accepted inputs. It compensates for schema gaps, though it slightly ambiguously suggests encode outputs both decimal and hex rather than being selectable via format.

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's purpose: ASCII encoding/decoding, with explicit definitions of encode (characters to decimal and hex codes) and decode (code values to characters). It distinguishes itself from sibling encoding tools by being ASCII-specific and specifying supported bases.

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 clear context for when to use the encode vs decode actions based on input and desired output. However, it does not explicitly compare this tool with sibling alternatives like encode_base64 or encode_utf8, lacking exclusionary guidance.

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