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x402node_crypto_aes-decrypt

Decrypt AES-256-GCM ciphertext with a 32-byte key, 12-byte IV, and authentication tag. Authenticated symmetric decryption for recovering original plaintext.

Instructions

AES decryption / AES-256-GCM decrypt / symmetric decryption / authenticated decryption / decrypt cipher / decode encrypted. Decrypt AES-256-GCM ciphertext given the key, IV, and authentication tag.

Price: unknown on Base (auto-paid in USDC).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
auth_tagYesAuthentication tag in hex (required)
ciphertextYesCiphertext in hex (required)
ivYes12-byte IV in hex (required)
keyYes32-byte key in hex (required)
Behavior3/5

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

No annotations provided. Description mentions 'authenticated decryption' and required inputs, but does not disclose error behavior (e.g., authentication failure), security considerations, or return value. Basic behavioral info is present but incomplete.

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

Conciseness4/5

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

The description is relatively concise, but the first line of redundant synonyms adds noise. The pricing line is not directly relevant. Overall, it is well-structured and front-loaded.

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

Completeness2/5

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

Given no output schema, the description should specify the output format (e.g., plaintext hex) and error conditions (e.g., authentication failure). It fails to do so, leaving the agent without key information for invocation.

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

Parameters3/5

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

Schema coverage is 100% with clear parameter descriptions. The description adds algorithm context (AES-256-GCM) and implies key/IV lengths, but does not significantly enhance meaning beyond schema.

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 'AES-256-GCM decrypt', lists synonyms, and specifies the operation (decrypt ciphertext given key, IV, authentication tag). It distinguishes from sibling x402node_crypto_aes-encrypt and other crypto tools.

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

Usage Guidelines3/5

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

The description mentions decryption but does not explicitly state when to use this tool, when not, or provide alternatives. It implies usage by naming the operation, but lacks explicit guidance.

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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