Skip to main content
Glama
ForeverJin

MCP Server for Segger RTT via J-Link

by ForeverJin

rtt_read_log

Retrieve the full RTT log tail from a J-Link debugged device without interfering with other active streaming clients.

Instructions

Read the tail of the complete RTT log file. This is an independent broadcast sink (not drained by other clients), so it returns the full RTT output even while another client (e.g. the VSCode extension) is streaming via rtt_read. Prefer this over rtt_read when another consumer is active.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
max_bytesNoMaximum bytes to return from the end of the log (default: 8192).
Behavior4/5

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

With no annotations, description discloses key behavior: independent broadcast sink, not drained by other clients, returns full output while others stream. Does not cover error conditions or side effects, but adequate for a read 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?

Two sentences, no wasted words, front-loaded with purpose, then adds behavioral context and usage advice. 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?

Given tool simplicity (one optional param, no output schema), description covers key differentiator and usage context. Slight lack of return format detail, but not essential.

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 covers 100% of parameters with clear descriptions. Tool description adds no further semantic meaning beyond schema, baseline of 3 appropriate.

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?

Description clearly states verb 'Read the tail of the complete RTT log file' and specifies it as an 'independent broadcast sink', distinguishing it from sibling rtt_read by noting it returns full output even with another consumer active.

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?

Explicit guidance to prefer this over rtt_read when another consumer is active. However, lacks comprehensive when-not-to-use advice for all sibling tools.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Install Server

Other Tools

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/ForeverJin/rtt_mcp'

If you have feedback or need assistance with the MCP directory API, please join our Discord server