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RapierCraft

alterlab-mcp-server

by RapierCraft

alterlab_refresh_session

Refresh a session by rotating cookies and resetting failure counters to update session after re-authentication.

Instructions

Refresh a session by rotating its cookies and resetting failure counters. This is the preferred way to update cookies after re-authenticating in your browser. The session status is reset to active. If cookies are omitted, only the failure counters are reset.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
session_idYesUUID of the session to refresh
cookiesNoNew cookie key-value pairs to replace the old ones. If omitted, only failure counters are reset.
headersNoUpdated custom headers to include with the session
Behavior4/5

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

With no annotations, the description carries full burden. It discloses that the session status is reset to active, and explains the effect of omitting cookies. It could mention if existing cookies are immediately invalidated or any authentication requirements, but overall it is transparent about core behaviors.

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?

Two sentences, front-loaded with the main action. Every word is purposeful, with no redundancy. Highly efficient.

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 tool with 3 parameters and no output schema, the description covers the main behavior and the optional cookie nuance. It could mention the return value or side effects, but it is sufficiently complete for an agent to understand usage.

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?

Schema coverage is 100%, so baseline is 3. The description adds value by clarifying that omitting cookies only resets failure counters, and that headers are updated. This provides context beyond the schema descriptions.

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 verb "Refresh" and the resource "session" with specific actions (rotating cookies, resetting failure counters). It distinguishes from sibling tools like alterlab_update_session by specifying the rotation and reset behavior, and by labeling it as the preferred way to update cookies after re-authentication.

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 a clear use case: "after re-authenticating in your browser." It also explains the behavior when cookies are omitted. However, it does not explicitly state when not to use this tool or mention alternative tools for other scenarios.

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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