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ForeverJin

MCP Server for Segger RTT via J-Link

by ForeverJin

rtt_clear

Clear the local RTT ring buffer to remove previously fetched data from the server's cache, preserving data on the embedded device.

Instructions

Clear the RTT ring buffer. This does not clear the actual RTT buffers on the device.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

With no annotations, the description carries the full burden. It reveals the non-destructive nature (does not clear device buffers) but omits any side effects, permissions, or return behavior, leaving the agent with incomplete behavioral understanding.

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 terse sentences convey the essential information without redundancy or unnecessary detail.

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 parameterless, simple action, the description covers the core behavior and clarifies what it does not affect. Minor gap: lacks any usage cues or prerequisites.

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?

No parameters exist, and schema coverage is 100%, so the description need not add parameter info. Baseline 4 is appropriate; no deduction needed.

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 ('Clear the RTT ring buffer') and explicitly distinguishes it from not clearing the actual device buffers, which differentiates it from sibling tools like rtt_write or rtt_read that operate on device buffers.

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 no guidance on when to use this tool (e.g., after certain operations) or when to prefer alternatives. It only states what it does, lacking context for the agent to decide appropriateness.

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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