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Inspect SQLite database

db_info
Read-only

Inspect SQLite schema and page/database metadata to understand structure and troubleshoot issues.

Instructions

Inspect SQLite schema and basic page/database metadata.

Input Schema

NameRequiredDescriptionDefault
fileYes
deviceIdNo
deviceNameNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.8.0

TDQS

B3.1/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds that it returns schema plus page/database metadata, but says nothing about permissions, the file being opened read-only, or failure modes. With annotations carrying the safety bar, a 3 is appropriate.

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?

A single tight sentence with no filler, front-loaded on the verb and resource. Nothing wastes space.

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 read-only inspection tool with full annotation coverage and no output schema, the description is broadly adequate, but it leaves the file/deviceId/deviceName parameters entirely unexplained, which is a notable gap for invocation correctness.

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?

Schema coverage is 0% and the description explains none of the three parameters. It never clarifies what "file" points to (a path? on which device?) or what deviceId/deviceName are for, leaving a real ambiguity an agent must guess at.

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 ("Inspect") and resource ("SQLite schema and basic page/database metadata"), which clearly distinguishes it from query-execution siblings like db_execute and db_query_start. It does not explicitly name those alternatives, but the read-only inspection framing is unambiguous.

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 routing to alternatives such as db_execute or db_query_start. The agent is left to infer that this is the read-only structural-inspection tool.

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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