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takeokunn

@takeokunn/metabase-mcp

by takeokunn

discard_database_values

Discard cached field values for a specified Metabase database, forcing a refresh of field metadata.

Instructions

Discard cached field values for a database in Metabase

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
inputYes
Behavior2/5

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

No annotations are present, and the description does not disclose behavioral details beyond the basic action. It does not state whether the operation is reversible, if it triggers a sync, or what the side effects are, leaving the agent uncertain about the impact.

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?

The description is a single, focused sentence with no unnecessary words. It efficiently communicates the core purpose without fluff.

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 simple tool with one parameter and no output schema, the description is minimal but adequate. However, it lacks information about the return value (e.g., success/failure) and does not clarify that it is a destructive action, which would be useful for an agent

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

Parameters2/5

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

With 0% schema description coverage, the description should compensate but does not add any parameter detail beyond what the schema already provides. The only parameter ('id') is not explained in the description, leaving no additional context.

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 action ('Discard'), the resource ('cached field values'), and the scope ('for a database'). It distinguishes from similar sibling tools like discard_field_values and discard_table_values by specifying the database level.

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?

No guidance is provided on when to use this tool versus alternatives like discard_field_values or discard_table_values. There is no mention of prerequisites, consequences, or context for use.

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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