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TestGraph
io.github.BBCBasic/testgraph in the official MCP registry.
Endpoint https://testgraph.21dle.co.uk/mcp-v2. Source: github.com/BBCBasic/TestGraph.
The registry describes it as: Shared semantic graph for AI reviews, classification and structured memory across AI assistants.
We read its 37 tools on 2026-10-26. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
set_review_visibility list_reviews_by_visibility list_my_mcp_interactions list_my_workflows get_induction get_server_info search fetch vocabulary_index list_root_subject_types list_child_subject_types get_subject_type_path resolve_subject_type resolve_subject get_subject_classification affirm_subject_classification propose_subject_reclassification reopen_subject_classification resolve_subject_hierarchy register_subject_type_alias set_type_relationship retire_type_relationship register_field enrich_subject save_experience delete_experience correct_subject_fact create_deliberation get_deliberation list_open_deliberations claim_deliberation submit_contribution record_resolution save_assessment assert_location get_location_assertions resolve_location_assertion
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/io-github-bbcbasic-testgraph)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.
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