pulse_browser_replay

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

With no annotations, the description carries the whole burden and does well: it discloses that each step validates its expected screen and halts on divergence, enumerates the returned fields (screen_id, title, viewport, anchor_count, anchors, screenshot_sha256) so no confirmation observe is needed, and flags that write/irreversible effects need explicit authorization. It omits what actually happens on divergence (error vs partial execution) and whether the page is left mutated.

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?

Four tight sentences, front-loaded with the core action, then behavior, then return value, then the authorization caveat. The return-field enumeration is dense but each item earns its place by replacing a confirmation call.

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?

Given no annotations, no output schema, and 0% schema coverage on 6 parameters, the description compensates well on returns and safety but leaves the parameter contract and failure mode undefined. An agent knows what it gets back but not confidently what to put in.

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 description coverage is 0% across 6 parameters, and the description explains almost none of them: start, target, target_url, app_id and port are never mentioned. Only 'explicit authorization' loosely gestures at authorized_effects without naming it or clarifying the write vs irreversible distinction.

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 specific verb and resource: 'Execute a previously verified route in one browser call.' The phrase 'previously verified route' plus 'in one browser call' distinguishes it from the single-step siblings pulse_browser_click / pulse_browser_observe, though no sibling is named explicitly.

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?

'previously verified route' implies a prerequisite (the route must already exist / be verified) and 'Write and irreversible effects require explicit authorization' implies a gate. But there is no explicit statement of when to pick this over pulse_browser_click, pulse_desktop_replay, or pulse_routine_*, and no 'when not to use' guidance.

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