Start SoundCloud login (add account)

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

The description discloses significant behavioral detail beyond annotations: the OAuth/PKCE flow, user browser interaction, account storage under an alias, active-account switching via make_default, local listener behavior, and the fallback path when the listener fails. The annotations are not contradicted; the description adds rich context about side effects and required follow-up.

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?

The description is compact yet information-dense, covering the flow, account storage, multi-account handling, callback mechanism, follow-up check, and failure fallback in three sentences. Every clause earns its place, and the primary purpose is front-loaded.

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 multi-step OAuth login tool with no output schema, the description provides the essential return value (authorize_url), user-facing browser step, persistence behavior, listener behavior, post-login status check, and failure fallback. An agent has enough context to invoke the tool and know what comes next.

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 input schema already fully documents alias and make_default, including defaults. The description adds only minor context by referring to the alias default as the SoundCloud username and restating that make_default controls active-account status. This meets the baseline but does not substantially enrich parameter understanding.

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 clearly states a specific action ('Start the OAuth 2.1 (PKCE) login for a SoundCloud account') with a concrete resource and return value (an authorize_url). It distinguishes itself from sibling auth tools by explicitly referencing soundcloud_auth_status and soundcloud_auth_complete as follow-up/fallback steps.

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?

It gives explicit when-to-use guidance: call to add accounts, call again for multiple accounts, and requires the user to be signed in as the other account in the browser. It also names alternatives/next steps (soundcloud_auth_status, soundcloud_auth_complete) and the condition for using the fallback, so an agent knows exactly how to proceed.

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