opencti-mcp-server
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TDQS
Scored across 5 tools
The observable tools overlap heavily: lookup_observable returns linked indicators and reports, get_observable returns linked indicators and reports, and observable_indicators lists linked indicators. The boundary between lookup-by-value and fetch-one-observable is not explicit enough, so an agent could easily choose the wrong tool.
Most names follow a verb_noun pattern (lookup_observable, search_indicators, get_indicator, get_observable), but observable_indicators breaks the convention as a noun-only name. The set is still readable overall.
Five tools is well within the appropriate 3-15 range and fits the focused read-only OpenCTI lookup purpose. Each tool maps to a recognizable query operation.
The server covers exact observable lookup, observable fetch, indicator search, indicator fetch, and linked indicators, which is a usable core. However, it lacks observable search or listing, report retrieval despite returning report links, and broader relationship exploration, leaving notable dead ends for common CTI workflows.