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crypto_ripemd

Read-onlyIdempotent

Compute RIPEMD-128, 160, 256, or 320 hash digests of UTF-8 text. Returns hex, base64, or base64url encodings.

Instructions

RIPEMD Hash Generator. Compute RIPEMD message digests of a UTF-8 text string, returning one digest per requested variant (RIPEMD-128/160/256/320). Use crypto_hash instead for MD5/SHA-1/ SHA-256/SHA-512, or crypto_sha3 for SHA-3/Keccak; RIPEMD-160 is the variant used in Bitcoin/altcoin address derivation. Runs locally on the input you provide: read-only, non-destructive, deterministic, contacts no external service, and is rate-limited (30 requests/min anonymous). Returns a hashes map keyed by variant, each with the digest in the chosen output format plus hex/base64/base64url renderings and the bit length.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
textYesText to hash, encoded as UTF-8 before digesting. The empty string is valid (RIPEMD-160 of the empty string is 9c1185a5c5e9fc54612808977ee8f548b2258d31).
algorithmsNoRIPEMD variants to compute, one digest each. At least one required; unknown values are rejected.
outputFormatNoEncoding of each hashes value: lowercase hex, uppercase HEX, standard base64, or URL-safe base64url. hex/base64/base64url are always also returned under formats regardless of this choice.hex

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
textNoThe input text, echoed back.
outputFormatNoThe output format applied to each value.
hashesNoMap keyed by variant id (e.g. ripemd160) to that variant digest.
timestampNoUnix epoch seconds when the response was generated.
Behavior5/5

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

Beyond annotations (readOnlyHint, idempotentHint), the description adds concrete operational details: local execution, no external service contact, rate limiting (30 req/min), and return structure. No contradiction with annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Every sentence earns its place. The description is compact but covers purpose, alternatives, behavioral constraints, and return structure. Front-loaded with the core action.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given full schema coverage, rich annotations, and presence of output schema, the description provides all necessary context: purpose, when to use, behavior, parameter semantics, and output details. Nothing missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so baseline is 3. The description adds significant value by explaining UTF-8 encoding, the empty string example, algorithm variant enum details, and the return format behavior (all formats always included). This goes beyond schema descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool computes RIPEMD message digests for a UTF-8 string and returns per-variant results. It explicitly differentiates from siblings by directing users to crypto_hash for MD5/SHA and crypto_sha3 for SHA-3/Keccak.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives explicit guidance on when to use this tool versus alternatives, including specific references to other tools for different hash families. It also notes the Bitcoin use case for RIPEMD-160, helping the agent decide relevance.

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

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