Marrow (getmarrow/marrow-mcp) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 56 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Emerging
74/100
1 month ago

Marrow

Marrow gives your agent a governance loop that compounds. With @getmarrow/mcp, any MCP-compatible client can ask Marrow before risky work, inspect live loop state during work, collect required proof, and commit outcomes when the work is done. That means your agent stops operating without accountability and starts carrying forward real decision history. Your agent stops repeating the same mistake

→ getmarrow/marrow-mcp· listed on glama

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

Code Verified⚡ Live Monitored: not connected

Verified is a snapshot. Live keeps it current, and builds your track record.

⚡ Connect GitHub → continuous verification on every pushwhy connect →

Who stands behind it

getmarrow

Source: Glama

Is this your MCP?

Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →

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Install from

Glama

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// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configMARROW_AGENT_CLIENT
configMARROW_AGENT_IDNo Bound agent identity for MCP tools
configMARROW_AGENT_RUNTIME
configMARROW_AUTO_ENROLL
configMARROW_AUTO_HOOK
configMARROW_CLIENT
configMARROW_CONTEXT_HOOK_DEBUG
configMARROW_EVENT_SPOOL_PATH
configMARROW_HARNESS
configMARROW_HOOK_DEBUG
configMARROW_PASSIVE_BRIEF
configMARROW_PASSIVE_VALUE_SUMMARY
configMARROW_RUNTIME_FALLBACK_BRIEF
configMARROW_VALUE_REPORT_PERIOD
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

56/56 tools missing one or more hints — marrow_orient (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); marrow_think (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); marrow_commit (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +53 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

Only 3/56 tools referenced in tests (5%)

Write tests that reference each tool by name so every tool has at least one test.

Shell command execution

3 child_process calls — runs shell commands

Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/getmarrow/marrow-mcp)](https://m8ven.ai/mcp/getmarrow/marrow-mcp)
Shows your grade and updates automatically. Prefer no grade? Append ?variant=verified to the badge URL.
commit: 7b1ff0e249f9c523e93e948f9ca13f5dc66b8a86
code hash: 73559476227ef1ef8530452e4aea48fc6ee518d3b637fbc7f2e47f72f05f921c
verified: 8/8/2026, 3:47:47 AM
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