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andreimaxim

rollbar-mcp

by andreimaxim

Get Rollbar data

rollbar_get
Read-onlyIdempotent

Perform read-only authenticated GET requests to Rollbar API endpoints to retrieve data such as items and instances. Supports query parameters.

Instructions

Make one authenticated GET request to a Rollbar API path. This tool is read-only and may truncate large output.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathYesRollbar API path beginning with /, for example /api/1/items or /api/1/instance/12345
queryNoOptional query parameters. Array values are encoded as repeated parameters.
environmentNoCredential environment. Use rollbar_list_environments to discover configured values. Defaults to prod.prod
Behavior4/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds value beyond annotations by stating 'authenticated' (auth requirement) and 'may truncate large output' (response truncation behavior), which are not captured in the annotations.

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 two sentences, front-loaded with the verb and resource. Every sentence earns its place: the first states the core action, the second adds read-only and truncation caveats. No redundant or extraneous wording.

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 generic API GET tool with three parameters, one nested, and no output schema, the description covers purpose, auth, read-only, and truncation. It does not specify return format (e.g., JSON), but that is somewhat implied and the schema covers parameter details.

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 all three parameters (path, query, environment) have descriptions in the schema. The description text adds no additional parameter semantics, so the 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?

The description states 'Make one authenticated GET request to a Rollbar API path,' clearly specifying the verb, resource, and scope. It distinguishes itself from the sibling rollbar_list_environments by being a generic API path wrapper, while the sibling is a specific environment-listing tool.

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?

The description provides clear context for when to use the tool: any authenticated GET to a Rollbar API path. It notes read-only behavior and truncation, but does not explicitly name alternatives or exclusions. The sibling tool is only referenced in the schema's environment parameter, not in the description text, so there is no explicit when/not guidance.

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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