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fix(browser_eval): align tool args with Playwright MCP 0.0.75 schema (target fields + fill_form) #141

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Merged
gaojude merged 2 commits into from
Jun 1, 2026
Merged

fix(browser_eval): align tool args with Playwright MCP 0.0.75 schema (target fields + fill_form) #141

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86eb6da
fix(browser_eval): map element refs to Playwright MCP 'target' fields
gaojude Jun 1, 2026
c3b1907
fix(browser_eval): update fill_form field shape for Playwright MCP 0.…
gaojude Jun 1, 2026
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71 changes: 59 additions & 12 deletions src/tools/browser-eval.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,16 @@ export const inputSchema = {
url: z.string().optional().describe("URL to navigate to (required for 'navigate' action)"),

element: z.string().optional().describe("Element to interact with (CSS selector or text)"),
ref: z.string().optional().describe("Reference to element from accessibility snapshot"),
ref: z
.string()
.optional()
.describe("Reference to element from accessibility snapshot (alias for 'target')"),
target: z
.string()
.optional()
.describe(
"Exact target element reference from the page snapshot, or a unique element selector. Preferred over 'ref'."
),
doubleClick: z
.union([z.boolean(), z.string().transform((val) => val === "true")])
.optional()
Expand All @@ -52,8 +61,20 @@ export const inputSchema = {
fields: z
.array(
z.object({
selector: z.string(),
value: z.string(),
element: z.string().optional().describe("Human-readable element description"),
target: z
.string()
.optional()
.describe(
"Exact target element reference from the snapshot, or a unique selector. Preferred over 'selector'."
),
selector: z.string().optional().describe("Alias for 'target' (back-compat)"),
name: z.string().optional().describe("Human-readable field name"),
type: z
.enum(["textbox", "checkbox", "radio", "combobox", "slider"])
.optional()
.describe("Field type (required by Playwright MCP)"),
value: z.string().describe("Value to fill into the field"),
})
)
.optional()
Expand All @@ -72,9 +93,17 @@ export const inputSchema = {
.describe("Only return error messages from console"),

startElement: z.string().optional().describe("Starting element for drag operation"),
startRef: z.string().optional().describe("Starting element reference"),
startRef: z.string().optional().describe("Starting element reference (alias for 'startTarget')"),
startTarget: z
.string()
.optional()
.describe("Exact source element reference for drag. Preferred over 'startRef'."),
endElement: z.string().optional().describe("Ending element for drag operation"),
endRef: z.string().optional().describe("Ending element reference"),
endRef: z.string().optional().describe("Ending element reference (alias for 'endTarget')"),
endTarget: z
.string()
.optional()
.describe("Exact target element reference for drag. Preferred over 'endRef'."),

files: z.array(z.string()).optional().describe("File paths to upload"),
}
Expand Down Expand Up @@ -134,18 +163,28 @@ type BrowserEvalArgs = {
url?: string
element?: string
ref?: string
target?: string
doubleClick?: boolean | string
button?: "left" | "right" | "middle"
modifiers?: string[]
text?: string
fields?: Array<{ selector: string; value: string }>
fields?: Array<{
element?: string
target?: string
selector?: string
name?: string
type?: "textbox" | "checkbox" | "radio" | "combobox" | "slider"
value: string
}>
script?: string
fullPage?: boolean | string
errorsOnly?: boolean | string
startElement?: string
startRef?: string
startTarget?: string
endElement?: string
endRef?: string
endTarget?: string
files?: string[]
}

Expand Down Expand Up @@ -215,7 +254,7 @@ export async function handler(args: BrowserEvalArgs): Promise<string> {
toolName = "browser_click"
toolArgs = {
element: args.element,
ref: args.ref,
target: args.target ?? args.ref,
doubleClick: args.doubleClick,
button: args.button,
modifiers: args.modifiers,
Expand All @@ -229,7 +268,7 @@ export async function handler(args: BrowserEvalArgs): Promise<string> {
toolName = "browser_type"
toolArgs = {
element: args.element,
ref: args.ref,
target: args.target ?? args.ref,
text: args.text,
}
break
Expand All @@ -239,7 +278,15 @@ export async function handler(args: BrowserEvalArgs): Promise<string> {
throw new Error("Fields are required for fill_form action")
}
toolName = "browser_fill_form"
toolArgs = { fields: args.fields }
toolArgs = {
fields: args.fields.map((f) => ({
element: f.element,
target: f.target ?? f.selector,
name: f.name,
type: f.type,
value: f.value,
})),
}
break

case "evaluate":
Expand All @@ -250,7 +297,7 @@ export async function handler(args: BrowserEvalArgs): Promise<string> {
toolArgs = {
function: args.script,
element: args.element,
ref: args.ref,
target: args.target ?? args.ref,
}
break

Expand All @@ -271,9 +318,9 @@ export async function handler(args: BrowserEvalArgs): Promise<string> {
toolName = "browser_drag"
toolArgs = {
startElement: args.startElement,
startRef: args.startRef,
startTarget: args.startTarget ?? args.startRef,
endElement: args.endElement,
endRef: args.endRef,
endTarget: args.endTarget ?? args.endRef,
}
break

Expand Down
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