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zhengyun1008

MCP Server for Oracle

by zhengyun1008

oracle_query

Execute read-only SELECT queries on Oracle databases to retrieve data securely with fine-grained access control and table-level permissions.

Instructions

Run a read-only SELECT query on an Oracle database

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
databaseNoDatabase connection name. Available:
sqlYesSELECT query to execute (read-only)
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It discloses that the tool is 'read-only' and for 'SELECT' queries, which covers basic safety and operation type. However, it lacks details on permissions, rate limits, error handling, or result formatting, leaving behavioral gaps for a database query 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?

The description is a single, efficient sentence with zero waste, front-loading the key information ('Run a read-only SELECT query on an Oracle database'). It is appropriately sized for the tool's complexity.

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?

Given no annotations, no output schema, and 2 parameters with full schema coverage, the description is minimally adequate. It covers the basic operation but lacks details on return values, error cases, or advanced usage, which would be helpful for a database query tool.

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 both parameters fully. The description adds no additional meaning beyond what the schema provides (e.g., it doesn't explain parameter interactions or constraints), meeting the baseline for high schema coverage.

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 ('Run'), resource ('Oracle database'), and operation type ('read-only SELECT query'), making the purpose specific and unambiguous. With no sibling tools, differentiation is not needed, but the description fully specifies what the tool does.

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

Usage Guidelines3/5

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

The description implies usage for read-only SELECT queries on Oracle databases, but does not provide explicit guidance on when to use this tool versus alternatives (e.g., other database tools or write operations). With no sibling tools, the context is clear but lacks exclusions or prerequisites.

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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