ToolTrust
A2/100
gannonh

memento-mcp

mcp0.3.9

@gannonh

Memento MCP: A Knowledge Graph Memory System for LLMs

By gannonh | 27 findings | Scanned 6/15/2026 | tooltrust-scanner/v0.3.17 | 420

2 Low25 Info

Risk Summary

Safe With Normal Controls

Dep Visibility is the main signal, but overall risk remains within an acceptable range.

Potential impact: This finding indicates the tool should be reviewed before it is trusted.

Recommended action: No high-risk findings were detected in this scan, but you should still apply least-privilege defaults and rescan after changes.

Suggested policy: keep this tool behind manual approval, do not allow unattended runs, and re-scan after narrowing risky permissions.

Security Findings (27)

  • LowAS-011

    ℹ️Missing Rate-Limit / Timeout ×2

    tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration

    search_nodessemantic_search

    Fix: Declare explicit rate-limit, timeout, and retry configuration for all network and execution tools. Implement exponential back-off and surface resource state to the calling agent.

  • InfoAS-002

    ⚠️Excessive Permissions ×8

    declared capabilities: filesystem access

    create_entitiescreate_relationsdelete_entitiesdelete_observationsdelete_relationsupdate_relation

    declared capabilities: network access, database access

    search_nodes

    declared capabilities: network access

    semantic_search

    Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

  • InfoAS-014

    ℹ️Dependency Inventory Unavailable ×17

    No metadata.dependencies or repo_url were exposed by this MCP server, and no local project manifest could be inferred from the launch command.

    create_entitiescreate_relationsadd_observationsdelete_entitiesdelete_observationsdelete_relationsget_relationupdate_relationread_graphsearch_nodesopen_nodessemantic_searchget_entity_embeddingget_entity_historyget_relation_historyget_graph_at_timeget_decayed_graph

    Fix: Review and remediate the identified issue.

Scan this tool yourself

Reproduce this audit locally, integrate into CI, or let your agent audit its own tools.

Install once, then scan any MCP server:

$ curl -sfL https://raw.githubusercontent.com/AgentSafe-AI/tooltrust-scanner/main/install.sh | bash
$ tooltrust-scanner scan --server "npx -y memento-mcp"

Adjust the package name if your npm registry name differs from the tool ID. View source

Add badge to your README

Copy this Markdown to show your ToolTrust grade on GitHub.

[![ToolTrust Grade A](https://raw.githubusercontent.com/AgentSafe-AI/tooltrust-directory/main/docs/badges/grade-a.svg)](https://github.com/AgentSafe-AI/tooltrust-directory)