Each tool has a distinct query modality: permission check, lookup by phone, lookup by email, fetch by ID, and search by name. No two tools overlap in input type or purpose, so misselection is unlikely.

All names use snake_case with a consistent `contacts_` prefix, and four of five follow a verb_noun pattern. `contacts_permissions` is a slight noun-form deviation but remains predictable.

Five tools is well-scoped for a read-focused Contacts helper: permissions, three query modalities, and one ID fetch. Each tool has a clear role and none feels redundant.

The surface covers access check and all common read paths (ID, phone, email, name). It lacks any list-all/browse operation or mutation tools, but those may be outside the stated read-lookup scope; core retrieval is covered.