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yeongbin-hwang

imply-druid-mcp

execute_sql_query

Execute SQL queries against Druid to get synchronous results from small datasets.

Instructions

Execute a SQL query against Druid and return results. Use this for synchronous queries on small datasets.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sqlYesSQL query to execute
timeout_msNoQuery timeout in milliseconds (optional)
Behavior2/5

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

No annotations are provided, so description carries full burden. It mentions synchronous execution but fails to disclose important traits like whether the query can modify data (SQL can be DDL/DML), error behavior, rate limits, or result size limits. This is a significant gap for a potentially mutation-capable tool.

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?

Two sentences, no redundancy, front-loaded with key information. Every sentence earns its place without waste.

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

Completeness4/5

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

Given 2 parameters, no output schema, and sibling tools, the description is mostly sufficient. However, lacks details on query restrictions (e.g., read-only recommended) or security considerations. For a simple tool, it's adequate but could be more complete.

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% (both parameters have descriptions in schema). The description adds context about synchronous and small datasets but does not provide additional parameter-specific meaning beyond the schema. Baseline 3 applies.

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?

Description clearly states verb (execute), resource (SQL query against Druid), and action (return results). It distinguishes from siblings by specifying synchronous queries on small datasets, contrasting with execute_async_query.

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

Usage Guidelines4/5

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

Explicitly states 'Use this for synchronous queries on small datasets', providing clear context for when to use. Implies not for large datasets or async needs, but does not explicitly list alternatives or when not to 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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