Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb and resource ('Delete a field') and scopes it with 'from an entity', which implicitly separates it from entities_delete and data_delete. It does not, however, name or differentiate against the close siblings fields_add, fields_update, fields_get, and fields_list, so the agent must infer the routing from the noun alone.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.