Memento Vault (sandsower/memento-vault) is an MCP server listed on the M8ven Trust Index. It scores 71 out of 100, grade C. It declares 20 tools. No publisher has claimed this listing.
Provides persistent knowledge capture and retrieval for coding agents. Enables searching the vault, storing notes, capturing sessions, and reading notes via MCP tools.
Limited view. Automated analysis covers part of this stack. Findings reflect what we verified. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
Limited view: static analysis for Python is partially covered.
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sandsower
Source: Glama
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MEMENTO_PI_PROCESSORMEMENTO_PI_PROCESS_QUEUE_MODELXDG_CONFIG_HOMEMEMENTO_HOSTMEMENTO_PORTXDG_DATA_HOMEPI_CODING_AGENT_SESSION_DIRMEMENTO_PI_TRANSCRIPT_ROOTSMEMENTO_TRANSPORTMEMENTO_API_KEYLONGMEMEVAL_BACKENDMEMENTO_VAULT_PATHMEMENTO_SEARCH_BACKENDMEMENTO_EVAL_FORCE_LLM_BACKENDMEMENTO_EVAL_NOWMEMENTO_REGEN_GOLDENMEMENTO_EVAL_VECTOR_ADVISORYMEMENTO_MODEL_CACHE_DIRXDG_RUNTIME_DIRMEMENTO_SWEEPER_ORPHAN_GRACE_SECONDSMEMENTO_AGENTXDG_CACHE_HOMEVOYAGE_API_KEYOPENAI_API_KEYGOOGLE_API_KEYMEMENTO_VAULT_URLCODEX_HOMEMEMENTO_PI_STATE_HOMEXDG_STATE_HOMEINDEX_PATHMEMENTO_DEBUGMEMENTO_OPENCODE_SESSION_IDTool 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
20/20 tools missing one or more hints — memento_search (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); memento_related (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); memento_query (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +17 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 inputs are validated
18/20 tool handlers declare input schemas (90%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 9/20 tool handlers wrap calls in try/catch (45%)
Wrap each tool handler body in try/catch and return a structured error response.
Tests exist
No test files found
Add tests that exercise each declared tool.
Shell command execution
4 child_process calls — runs shell commands
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
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