@webuplink/mcp

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions session opening and continuation, but it does not disclose side effects of executing tools on a page, whether actions can mutate state, what happens to a session, or what output the caller should expect.

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?

Two sentences with no filler. The primary browsing purpose is front-loaded, and the session-handling distinction is stated immediately and efficiently.

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?

The description plus schema provides a workable overview, but important context is missing: how tool/tools/params interact, what include_page_content affects, what executing tools returns, and any session lifecycle details. With no output schema and no annotations, this leaves the agent to infer a fair amount.

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?

The input schema already covers each parameter at 100%, so the baseline is 3. The description adds value by explaining the relationship between url and session_id (new session vs existing session) and framing tool/tools/params as actions executed on the page, which goes slightly beyond individual schema descriptions.

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 the tool browses web pages and executes tools on a page, and it distinguishes session-opening behavior from the sibling close_session via 'open a new session' and 'continue an existing session.' However, it does not explicitly name the sibling or draw an explicit contrast with closing a session.

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?

The description gives explicit guidance on when to use url versus session_id, which is useful. It does not, however, discuss when to prefer close_session, when not to use browse, or any prerequisites or constraints around executing tools on a page.

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

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

Without annotations, the description must carry the behavioral disclosure burden. It usefully reveals that sessions auto-expire and that closing frees resources, but it doesn't state whether closing is irreversible, whether invalid session IDs error, or what side effects occur beyond resource release.

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?

Two concise sentences front-load the action and rationale, then add useful lifecycle context. No fluff or redundancy.

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 single-parameter tool with no output schema, the description covers what, why, and when to call it, plus the session lifecycle context. It omits error/idempotency details but these are minor for a straightforward session-close operation.

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 only parameter's meaning is already documented. The description adds no format, requirement, or default information beyond 'session ID to close'.

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?

States a clear action ('Close'), the resource ('a browser session'), and the rationale ('to free resources'). This distinguishes it from the sibling browse, which is about using/navigating a session rather than ending it.

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?

Explicitly advises that cleanup is recommended and informs the user that sessions auto-expire after 5 minutes, which tells when an explicit call is necessary. It doesn't discuss when not to use it, but for a simple cleanup tool this context is sufficient.

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