Re-login with stored credentials

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=false, destructiveHint=false and idempotentHint=false, so the write-but-not-destructive profile is known. The description adds genuinely useful context beyond that: the required API key scope accounts:write and the underlying POST endpoint. It does not disclose what 'stored credentials' means, whether existing sessions are invalidated, or what happens when the stored credentials are rejected.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Three short lines, front-loaded with the action and followed by the auth requirement and endpoint; nothing is padded or redundant. The HTTP verb/path line is borderline API-doc boilerplate, but it carries real routing information here.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a state-changing authentication operation with no output schema and sparse annotations, the description should say what a call actually does to the account (new session vs. reuse, effect on current session) and what failure looks like. As written it leaves the agent unable to predict side effects or judge retry behavior, which matters given idempotentHint=false.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3 even though the schema's own text ('Path parameter `id`') is tautological. The description's path template POST /accounts/{id}/relogin indirectly clarifies that id is an account identifier rather than a campaign, folder or audience id, which is meaningful in a toolset with many entity types, but no format or sourcing detail is added.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific action (re-login) on a specific resource (an account identified by id) using stored credentials, and the POST path confirms it is an account-state operation. It is distinguishable from siblings like get_login_status or check_account_session, though it never explicitly contrasts itself with them.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no when-to-use guidance: nothing says whether this should be called after a failed check_account_session, when get_login_status reports an expired session, or in place of verify_account_2fa. The reader must infer the trigger condition entirely, and the closely related sibling tools are not mentioned as alternatives or prerequisites.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.