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Create DRep Update Certificate

cardano_governance_drep_update_certificate
Idempotent

Update a DRep's anchor metadata by generating a certificate. Requires the DRep verification key and output path; optionally specify new anchor URL and data hash.

Instructions

Create a DRep update certificate to update anchor metadata.

Args:

  • drep_verification_key_file (string): Path to DRep verification key file

  • anchor_url (string, optional): Updated anchor URL

  • anchor_data_hash (string, optional): Updated anchor data hash

  • out_file (string): Output path for the certificate

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
out_fileYesOutput path for the certificate
anchor_urlNoUpdated anchor URL
anchor_data_hashNoUpdated anchor data hash
drep_verification_key_fileYesPath to DRep verification key file

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

C2.9/5.0
Behavior2/5

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

Annotations already declare the full safety profile (readOnlyHint=false, destructiveHint=false, idempotentHint=true, openWorldHint=false), so the description is not the sole source of behavioral truth. However, it adds nothing beyond them: it never states that the produced certificate must be embedded in a transaction to take effect, what permissions a DRep needs, or what happens to prior anchor data. It does not contradict the annotations.

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

Conciseness3/5

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

The opening sentence is well front-loaded, but the 'Args:' block duplicates the schema descriptions word-for-word and therefore earns no place given 100% coverage. Half the description is redundant rather than concise.

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

Completeness3/5

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

For a certificate-generation tool with no output schema, the description adequately covers inputs and the file output via the schema, and annotations cover safety. The remaining gap is workflow context: it never explains that the certificate file is meant to be consumed by transaction_build/transaction_sign, which an agent in this large sibling set would benefit from knowing.

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 description coverage is 100%, so the schema already documents all four parameters, and the description merely repeats those exact strings verbatim. Per the baseline rule for high coverage, a 3 is the correct ceiling when the description adds no syntax, format, or constraint detail beyond the schema.

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

Purpose4/5

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

States a specific verb and resource ('Create a DRep update certificate') and adds the distinguishing purpose ('to update anchor metadata'), which separates it from the sibling registration and retirement certificate tools. It stops short of naming those siblings, so an agent must infer the boundary from the resource name alone.

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

Usage Guidelines2/5

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

There is no when-to-use guidance, no prerequisites, and no alternatives mentioned. The argument list documents inputs but gives no condition under which this certificate should be created versus a registration, retirement, or vote-delegation certificate.

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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