Problem
Agents creating investigation content need write tools that enforce validation and maintain relationship integrity.
Scope
4 write-tier MCP tools:
`investigation_create_entity`
Create person, organization, asset, or account entries
Validates required fields per type
Auto-generates ID from title
Deduplication check: warns if entity with similar name/alias exists`investigation_create_event`
Create investigation_event, transaction, or legal_action entries
Validates date, required fields per subtype
For transactions: validates sender/receiver exist (warns if not)
For legal_actions: validates jurisdiction`investigation_create_claim`
Create claim with evidence links
Validates: at least one source or evidence link
Sets initial status to `unverified`
Warns if similar claim already exists (title similarity)`investigation_log_source`
Log a source document with reliability assessment
Fields: title, url, source_type, reliability, classification, obtained_method
URL deduplication: warns if URL already logged
Auto-checks URL liveness if check-urls capability is availableAcceptance Criteria
All 4 tools registered in MCP write tier
Validation errors return clear messages, don't create partial entries
Deduplication warnings are advisory, not blocking
Created entries are immediately queryable via read-tier tools