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montumodi

MongoDB Atlas MCP Server

by montumodi

datalake_update

Update a MongoDB Atlas Data Lake by supplying its name and a body with the attributes to change. Modify properties such as storage rules or data expiration.

Instructions

Update a Data Lake

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataLakeNameYes
bodyYes
optionsNoOptional parameters
Behavior1/5

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

No annotations are provided, so the description must carry the burden. The description gives no information about side effects, required permissions, or what happens during the update (e.g., partial vs full replacement, idempotency).

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness2/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is only 4 words, which is too minimal. While concise, it omits essential information, sacrificing completeness for brevity. It does not follow the principle of every sentence earning its place.

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

Completeness1/5

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

The tool has 3 parameters (2 required, one with nested object) and no output schema. The description fails to explain what 'update' entails, what the body object should contain, or what the response looks like. Contextually incomplete.

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

Parameters1/5

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

Schema description coverage is only 33% (only 'options' has a description). The description does not explain 'dataLakeName' or the structure of 'body'. The agent has no hint about what fields to include in the body object.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose2/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Update a Data Lake' is a verb+noun but lacks specificity. It does not distinguish from siblings like datalake_create or datalake_get; the scope and effect of the update are unclear.

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

Usage Guidelines1/5

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

No guidance on when to use this tool versus alternatives (e.g., datalake_create for creation, datalake_delete for deletion). No prerequisites or context provided.

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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