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DB-25

arc-control-mcp

Reload Tab

reload_tab
Idempotent

Reload a browser tab and verify the page actually changed, even in background. Confirms new document loaded, returns tab details, fails if old content persists.

Instructions

Reload a tab, then confirm the document really was replaced rather than assume it. Works on a background tab. Takes wait_until_loaded and timeout_ms like the other navigating tools, and returns from, to and the tab. Fails with ok false when the tab is still showing the document that was there before, which is what a slow server or a page holding on to unload looks like from outside.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
tab_idNoArc tab id from list_tabs. Omit to use this agent's current tab, falling back to whatever tab is active in Arc.
timeout_msNoHow long to wait for loading. Capped at 30000ms, because a longer call is killed by the client before it can answer. To wait longer, call wait_for_load again: repeated short waits each hand back a real readyState and url, which one long wait does not.
wait_until_loadedNoWait for the page to finish loading before returning
Install Server

TDQS

A4.5/5.0
Behavior5/5

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

Since annotations are present, the description goes well beyond them by revealing the tool verifies the document was replaced, returns from/to/tab, and fails with ok false when the old document persists. This gives the agent insight into slow-server and unload-handler behavior without contradicting the readOnly=false, destructive=false, idempotent=true, openWorld=true annotations.

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

Conciseness5/5

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

The description is compact and front-loaded: the core action and verification intent come first, followed by background-tab support, parameter compatibility, return values, and failure semantics. Every sentence adds information without padding.

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

Completeness5/5

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

Given there is no output schema, the description properly explains what is returned (from, to, tab) and the failure condition (ok false). Combined with the fully documented parameters and annotations, this is enough for an agent to select and call the tool correctly.

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

Parameters3/5

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

Schema description coverage is 100%, so the schema already documents tab_id, timeout_ms, and wait_until_loaded. The description adds little beyond saying these are 'like the other navigating tools,' which is contextually useful but not substantial new parameter meaning.

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

Purpose5/5

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

The description states a specific action ('Reload a tab') and a resource, then adds the distinct verification purpose: 'confirm the document really was replaced rather than assume it.' This distinguishes reload_tab from siblings like go_back/go_forward/wait_for_load by making its unique behavioral contract explicit.

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

Usage Guidelines4/5

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

The description gives clear usage context by noting it works on a background tab, shares parameters with other navigating tools, and returns from/to/tab. It does not explicitly name alternatives or say 'use this instead of X,' but the verification-focused language and failure semantics make the intended context reasonably clear.

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

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