Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. 'Update' implies mutation, but the description doesn't specify required permissions, whether changes are reversible, what fields can be updated in team_data, or what the response looks like. For a mutation tool with zero annotation coverage, this leaves critical behavioral questions unanswered.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.