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thhart

database-mcp

by thhart

profile_test

Check a database profile's connectivity, retrieving server version and connection latency to verify access.

Instructions

Test connectivity of a profile (default profile when omitted): server version and connect latency.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are provided, so the description bears the full burden of disclosing behavior. It states the action and output, but does not mention that it is read-only, non-destructive, or safe to run. For a connectivity test, this is likely an expected safety profile, but it is not stated, leaving ambiguity about side effects.

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, well-constructed sentence that front-loads the primary action and outcome. There is no fluff or redundant information; every word earns its place.

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?

For a simple tool with one optional parameter and an output schema, the description covers the essential purpose and result (server version and latency). It doesn't detail failure modes, but the output schema likely covers that. It is sufficiently complete for an agent to know what to expect.

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

Parameters4/5

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

With 0% schema description coverage, the description must clarify the parameter. It explicitly says 'profile (default profile when omitted)', which explains the meaning of 'name' and its default behavior. This adds substantive semantics beyond the schema's bare type and default.

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 states a specific verb ('Test connectivity') and resource ('a profile'), and clarifies the default when omitted. It names the observable outcome (server version and connect latency), which clearly distinguishes it from siblings like 'status' or 'profiles'.

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?

The description provides context on the default profile but gives no guidance on when to use this tool versus alternatives such as 'status' or 'profiles'. There are no explicit when-to-use or when-not-to-use instructions, leaving the agent to infer its purpose.

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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